Ladies and gentlemen, thank you for standing by, and welcome to the Gaotu Techedu Q4 and Fiscal Year 2022 Earnings Conference Call. All participants will be in listen-only mode. Should you need assistance, please signal a conference specialist by pressing the Star key followed by zero. After today's presentation, there will be an opportunity to ask questions. To ask a question, you may press Star then one on your telephone keypad. To withdraw your question, please press Star then two. Please note this event is being recorded on Tuesday, February 28th, 2023. I would now like to hand the conference over to your first speaker today, Ms. Sherry Liu, IR Manager of Gaotu. Thank you. Please go ahead.
Thank you very much, operator. Good evening, everyone. Thank you very much for joining us on Gaotu's Q4 and Fiscal Year 2022 Earnings Conference Call. Gaotu's earnings release for the Q4 and full fiscal year was published earlier today and is available on the company's IR website at ir.gaotu.cn. Joining the call with me tonight from Gaotu senior management is Ms. Shannon Shen, Gaotu's Chief Financial Officer. Shannon will first read the prepared remarks on behalf of Larry Chen, Gaotu's Founder, Chairman, and Chief Executive Officer, and then Shannon will discuss the financials in more detail. Following the prepared remarks, Shannon will be available for the Q&A session. Before we begin, I'd like to remind you that this conference call will contain forward-looking statements as defined in the U.S. Private Securities Litigation Reform Act of 1995.
These forward-looking statements are based upon management's current beliefs and expectations as well as the current market and operating conditions, they involve known or unknown risks, uncertainties and other factors, all of which are difficult to predict and many of which are beyond the company's control. They may cause the company's actual results, performance or achievements to differ materially from those contained in any forward-looking statement. Further information regarding these and other risks is included in the company's public filings with the U.S. SEC. The company does not undertake any obligation to update any forward-looking statements, except as required under applicable law. During today's call, management will also discuss certain non-GAAP measures for comparison purposes only. For the definition of non-GAAP financial measures and reconciliations of GAAP to non-GAAP financial results, please refer to our Q4 and fiscal year 2022 earnings release published earlier today.
As a reminder, this conference is being recorded. In addition, a live and archived webcast of this conference call will be available on Gaotu's IR website. It is now my pleasure to introduce Shannon, who will provide this quarter's general business highlights on behalf of Larry. Shannon, please.
Thank you, Sherry. Hello, everyone. This is Shannon speaking. Larry is in the middle of his live streaming session on Douyin right now. It is part of his 15-day consecutive book reading session on Douyin. Larry's valuable explorations in the short-video ecosystem have huge strategic significance in the future business development and brand enhancement for Gaotu. Please excuse his absence tonight. I will read Larry's prepared remarks on his behalf. Good evening and good morning, everyone. Thank you for joining us on Gaotu's Q4 and Fiscal Year 2022 Earnings Conference Call. I would like to take this opportunity to once again convey my gratitude for your continued interest in and support for Gaotu and the education industry. Before I start, I would like to remind everyone that all financial information that I mention later is based on RMB, unless otherwise noted.
We delivered a decent set of results in the Q4 of 2022. We achieved steady quarter-over-quarter revenue growth for the third consecutive quarter, and we also reported another profitable quarter with a sensible net operating cash inflow. Our net revenues for the quarter increased to RMB 629.6 million. Our gross billings secured a significant quarter-over-quarter increase of 64.3% to approximately RMB 1 billion, symbolizing that our business have entered a phase of continued steady development. During the quarter, we attained a net income margin of 11.2% and a non-GAAP net income margin of 13.9%, which brought our non-GAAP net income margin for the full fiscal year to 5.4%.
Even more noteworthy is that we recorded a net operating cash inflow of RMB 476.7 million during the quarter, which meaningfully lifted the full year number into positive territory and strengthened our cash position, attesting to our superior operational efficiency. We achieved effective growth on both a quarter and an annual base, which is the combination of our unwavering commitment to our long-lasting strategy for profitable growth and our relentless efforts to optimize students' experience and teaching quality.
We are pleased to close a challenging 2022 on such solid footing, which has reinforced our confidence as we welcome unknown challenges in the next year. As we enter the spring season alongside the health growth momentum, our organization has shown exceedingly resilient and cohesive, and we are ready to deliver another year of profitability and substantial net cash inflow from operations in 2023. Going forward, we will continue to execute our customer-centric, long-term oriented, and substantial growth strategy to create enduring value for our students, employees, and shareholders. Now, I would like to provide updates on the progress we made this quarter from the following four aspects. First, each of our core business lines remained on a steady growth trajectory.
The sharp sequential increase in gross billings during the quarter was mostly driven by non-academic tutoring services and other traditional learning services, which partially benefited from favorable seasonality. In terms of revenues, we saw quarter-over-quarter growth across both educational services for college students and adults, and in our academic tutoring services. Especially, the postgraduate entrance exam prep business reaped a quarterly profit for the first time. Looking ahead, we expect our business segments to sustain their positive growth momentum in 2023. Second, we continued to focus on enriching our talent pool and enhancing our organizational capabilities. At Gaotu, our underlying philosophy is that love, compassion, goodness, and patience are the cornerstones of education. We always remind ourselves of our original aspirations to educate and to uphold the highest level of education to essentially deliver compelling learning results by offering tailored services through outstanding teaching experts.
Dedicated teachers have always been our core competitive advantage. Internally, we are actively cultivating more excellent instructors and tutors. Externally, we have also established long-term partnerships with top universities and colleges to continuously channel teaching professionals passionate about education to Gaotu. During this quarter, we successfully hosted 2023 Gaotu-Beida Management Trainee Recruitment Event at Tsinghua and Beida University to engage more expert young talents. Moving forward, we will continue to invest additional efforts into recruiting top-notch talent who meet our strict hiring standards across various fields to build the long value chain of education and reinforce our deep-rooted competitiveness. Third, we continued to improve our operational efficiency. On the services front, gross profit margin during the quarter registered both year-over-year and quarter-over-quarter increase due to higher course delivery efficiency.
Regarding customer acquisition, we reduced our sales and marketing expenses margin by 9.5 percentage points as compared to last quarter to 46%. At the same time, the selling expenses ROI saw sequential improvement, representing greater marketing efficiency. Meanwhile, to develop proprietary channels with higher conversion rates, we are actively implementing private traffic acquisition through short-video platforms, offline channels, and others to further enhance customer acquisition efficiency. As for headquarter expenses, compared with the prior quarter, they remained largely flat with moderate declines after adjusting for the exchange loss and the negative impact of some one-off expenses of the quarter. Going forward, we expect our headquarter expenses to remain stable as our revenues expand, and our operating leverage should lead to accelerated profitability improvements. Last but not least, we continued to explore and experiment with new business initiatives to expand the range of our offerings.
In the Q4, we officially started our live streaming e-commerce journey on Douyin, the Chinese version of TikTok. Our live streaming brand, Gaotu Jiapin, debuted on the evening of December 21st last year. I also launched my personal account on Douyin to share my experience on career and personal development and offer some life lessons. As we continue to undergo transformation, I would like to personally explore the boundless possibilities of this platform through multifaceted learning and repeated upgrades. Since we started out as a live online large class tutoring services provider, we have a rich talent reserve whose capabilities resemble that of an ideal live stream host.
By leveraging the superior presentation skills and vast knowledge base acquired through years of live teaching, our live stream hosts have a natural advantage in providing high quality and appealing content. Enabling them to seamlessly pivot from imparting knowledge to students to sharing wholesome food and quality lifestyle with consumers. With the mission of making less better, Gaotu Jiapin is committed to serving as a bridge between producers and consumers, introducing customers to reputable products with proven excellent quality and high repurchase rates. We believe our endeavors in the live streaming business will create huge leverage in terms of brand exposure and brand enhancement. As of now, we are still in the initial stage of this undertaking, and we will continue to accumulate insight and know-how on short-video operations going forward.
As I have always said to our teams, the best times are usually the toughest times, and the hardest times often lead to the best moments in our lives. It is because everyone of us at Gaotu is unceasingly devoting their best efforts and unyieldingly displaying the same enthusiasm, humility, and entrepreneurship that we started with day one, that we are transforming into a better Gaotu every day. Looking ahead into 2023, guided by our effective growth strategy, we will continue to develop, continue to innovate, and continue to contribute to the development of education in China. Thank you everyone for listening. This concludes Larry's prepared remarks. grew 3.9% quarter-over-quarter to RMB 629.6 million.
Our gross billings increased by a considerable 64.3% quarter-over-quarter to approximately RMB 1 billion. The notable rise in gross billings was driven by our enhanced educational product quality, the daily growing user base, and sound business development. As a leading indicator for revenues, gross billings meaningful expansion has boosted our confidence in our top-line growth prospects for 2023. Our net income for the quarter was RMB 70.6 million, and non-GAAP net income was RMB 87.4 million, which led to a net income margin of 11.2% and a non-GAAP net income margin of 13.9%.
In addition to attaining profitability, we also generated a sizable net operating cash inflow of RMB 476.7 million, and recorded a year-over-year increase in cash reserves during the quarter, fostering the long-term development of our company and validating our continuous improvement and efficiency optimization efforts. Turning to our full-year results. Net revenues and gross billings for fiscal year 2022 both reached approximately RMB 2.5 billion. Meanwhile, we also achieved profitability on a full year basis. Our net income for the year was RMB 13.2 million, and our non-GAAP net income was RMB 135.8 million, yielding a net income margin of 0.5% and a non-GAAP net income margin of 5.4%. In addition to earning annual profitability, we also generated a net operating cash inflow of RMB 54.5 million this year.
Annual pro-profitable top-line growth coupled with positive bottom line and cash inflow, it is clear testament to the resilience, innovative ability, and operational efficiency of our organization. The sizable cash inflow drove continuous growth in our cash reserves. As of December 31, 2022, our cash equivalents, restricted cash, and short-term investments increased by RMB 72.7 million compared to that at the end of 2021 to approximately RMB 3.7 billion, providing solid ground for our continued operations and exploration of new initiatives. We categorized our main businesses into two sectors: learning services and educational content and digitalized learning products. Learning services are comprised of educational services for college students and adults, non-academic tutoring services, and other traditional learning services, whereas educational content and digitalized learning products primarily are supportive smart learning tools that serve as supplements to learning services.
I will now elaborate on the progress we have made in each of these business lines during the quarter. First, learning services accounted for over 90% of net revenues in the quarter. Breaking it down, close to 60% of revenues came from non-academic tutoring courses and other traditional tutoring courses. Our non-academic tutoring services consist of intelligent-Creatively presented courses modules that encourage school-aged kids holistic progress by improving students' overall learning capability, nurturing their comprehensive development, sparking their interest and passion, and motivating them to be continuously inquisitive. Paid course enrollments for our non-academic courses in the Q4 achieved triple digits quarter-over-quarter growth. We constantly upgrade and refine the curriculum design of our non-academic tutoring courses with the intention of improving students' integrated development, which led to higher retention rates during the quarter. In December last year, the government has published clear policy guidelines.
Going forward, we will constantly improve our retention rates and customer satisfaction by engineering courses products that exceed the expectations of students and parents while ensuring compliance. Non-academic tutoring and other traditional courses exhibit a silent seasonality. For online businesses, such as ourselves, the second and Q4 are normally course retention seasons, during which gross billings are mostly contributed by existing students renewing their courses and typically account for a higher percentage of annual gross billings than the first and Q3s. As our businesses continued to gain traction and our retention rates rebounded, gross billings from our non-academic tutoring services increased roughly 90% quarter-over-quarter, creating a strong foundation for the future revenue growth.
Aside from the above mentioned, the other crucial component to learning services is educational services for college students and adults, which nearly doubled in revenue compared to the same period of last year, constituting more than 30% of revenues for the quarter. Our core business focus for this sector includes postgraduate entrance exam prep services, financial certificate prep services, civil services exam prep services, and overseas related services. Among these verticals, the postgraduate entrance exam prep business recorded a quarter-over-quarter revenue increase of roughly 23% and celebrated its first profitable quarter. Lastly, the remainder of our less than 10% revenues came from educational content and digitalized learning products, which mainly include intelligent learning products for students, such as smart textbooks and learning apps. These complementary products are designed as supplements to our course products to fulfill students' various learning needs.
Next, I will present our financials in detailed numbers. Our cost of revenues this quarter was RMB 159.3 million. Our gross profit increased 7.5% quarter-over-quarter to RMB 470.3 million. Gross profit margin was 74.7%, representing a 504 basis point increase year-over-year and a 255 basis point increase quarter-over-quarter. Non-GAAP gross profit increased 7.9% quarter-over-quarter to RMB 473.9 million, and Non-GAAP gross profit margin was 75.3%. The increase in gross profit margin was largely due to higher course delivery efficiency. Operating expenses decreased 23.2% year-over-year, and 4.6% quarter-over-quarter to RMB 483.6 million.
Breaking it down, selling expenses decreased 22.3% year-over-year, and 14% quarter-over-quarter to RMB 289.8 million, accounting for 46% of net revenues, which was 9.5 percentage points lower than in the Q3. The quarter-over-quarter decrease in selling expenses can be explained by two factors. First, in terms of customer acquisition, we are constantly seeking out more innovative, cost-effective channels with better conversion rates to precisely target high intent customers with strong willingness to pay. On one hand, we have set up our own matrix accounts on short-video platforms to attract high quality users with premium content creation, while continuously performing customer-made activation and retention of private traffic. Some of our courses have achieved breakthroughs on live streaming platforms.
For instance, one of our English instructors has ranked among the top five of the Douyin virtual live product channel, or 虚 拟 生 活 , in terms of GM weight for multi times. On the other hand, we have been exploring more offline channels, offering more tailored trail courses to better serve students in local regions and cities, and targeting prospective students with high granularity. At the same time, after over a year of providing consistently high standard services and the superior quality courses content, we are gradually establishing our brand and reputation among college students and adults. We have significantly reduced selling expenses through greater reliance on word-of-mouth referrals. Looking ahead, we will continue to enhance our conversion rate and improve our selling expenses ROI through focusing on college students as our target customer base to drive sustainable long-term growth.
Second, from a seasonality standpoint, the Q4 is not the most efficient season for new student enrollments for non-academic tutoring services and other traditional services. As such, we allocated lower marketing expenses during the quarter considering operational efficiency. Moving on. Research and development expenses decreased 10.9% year-over-year to RMB 111.4 million, accounting for 17.7% of net revenues. If we exclude the negative effects of some one-off expenses, R&D expenses remain flat with moderate quarter-over-quarter declines. General and administrative expenses decreased 14.1% year-over-year to RMB 82.4 million, accounting for 13.1% of revenues. The sequential slight increase in G&A expenses were the combined effects of unrealized exchange losses due to large unexpected exchange rate fluctuations and some one-off expenses. Loss from operations for the quarter was RMB 13.2 million.
Non-GAAP income from operations was RMB 3.5 million. Non-GAAP operating margin was 0.6%. Total other income, its sequential increase to a large extent was due to gains from wealth management instruments and value added tax related benefits. Due to greater possibilities for future profitability, we also recognized an appropriate amount of income tax benefits resulting from deferred tax assets. During the quarter, net income was RMB 70.6 million. Non-GAAP net income was RMB 87.4 million. Our net operating cash inflow was RMB 476.7 million. Moving on to our full fiscal year results in 2022. Our loss from operations was RMB 118.1 million. Non-GAAP income from operations was RMB 4.6 million. Net income for the year was RMB 13.2 million.
Non-GAAP net income was RMB 135.8 million. Our net operating cash inflow was RMB 54.5 million. Turning to our balance sheet as of December 31, 2022. We had RMB 819.9 million cash equivalents and restricted cash, and RMB 2.9 billion in short-term investments, totaling approximately RMB 3.7 billion. As of December 31st, 2022, our deferred revenue balance was RMB 959.3 million, which primarily consists of tuition received in advance, and a large proportion of which will be recognized as revenues within one to two quarters. Our founder, chairman and CEO, Larry Chen, has increased his shareholding by an aggregate of 3.6 million ADSs in 2022, highlighting management firm confidence in the future development of our company.
Before I provide our business outlook for the next quarter, please allow me to remind everyone that this contains forward-looking statements which involve risks and uncertainties which are beyond our control and could cause the actual results to differ materially from our predictions. Based on our current estimates, total net revenues for the Q1 of 2023 are expected to be between RMB 686 million and RMB 706 million, representing a decrease of 5.3%-2.6% on a year-over-year basis. This concludes my prepared remarks. Operator, we are now ready for the QA section. Thank you everyone for listening.
We will now begin the question and answer session. To ask a question, you may press Star, then one on your telephone keypad. Using a speakerphone, please pick up your handset before pressing the keys. To withdraw your question, please press Star, then two. Once again, that was Star, then one to ask a question. At this time, we will pause momentarily to assemble the roster. Our first question will come from Duolan Lian of Guotai Securities. Please go ahead.
Okay, thanks. Firstly, congratulations on the stunning financial results on Q4 and the whole fiscal years. Thanks for taking my question. I have two questions for management. The first one is how will the product structure be adjusted in the next fiscal year? My second question is what are the quarter-on-quarter changes in spring enrollments of each courses, and what are the changes compared with the same period on last spring semester? Thanks.
Thanks, Duolan, for your question. First, for the product structure or for the revenue structure, we foresee it to maintain sustainable in the Q1 in 2023. Which means the learning services will still be the largest revenue contributor that is, it will contribute over 90% of the revenues, and the remainder of the 10% will contributed by the digital products. Within the 90% of the learning services revenues, we foresee the learning services from college students and the adult business to contribute around 30% of the total revenues. The rest will contributed by our non-academic tutoring services and other traditional learning services. For your second question, like the quarter-over-quarter enrollments on the, you know, spring semester.
Because our businesses are slightly different between 2023 and 2022. If we can recall that in the 1st quarter in 2022, we announced a public release that we kinda like ceased our children services for the high school section. But like in the Q1 in 2023, some of the traditional learning services will be picked up again. The enrollments is not that comparable between these two quarters. Going forward, we will be providing more specific instructions on the enrollment if the business develop in a more stable stage. Thanks.
Okay. Thank you.
This concludes our question and answer session. I would like to turn the conference back over to Ms. Sherry Liu for any closing remarks.
Thank you, operator. Thank you everyone for joining the call today. If you have any further questions, please don't hesitate to contact our investor relations department or our management via email at ir@gaotu.cn directly. You're welcome to subscribe to our news alert on the company's IR website. You're also cordially invited to join Larry's live streaming session on Douyin right now. Thank you very much again for your time. Have a great night.
The conference is now concluded. Thank you for attending today's presentation. You may now disconnect.