Thank you, Lei.
Firstly, I'd like to begin by touching on our first quarter operational and financial highlights before taking questions.
Our total written premiums placed for this quarter increased 15.6% to RMB 7.4 billion or USD 1 billion, while total written premiums placed for the full year of 2024 increased by 7.5% over the prior year to RMB 24.3 billion or USD 3.3 billion. The total number of policies issued increased from RMB 4.8 million year quarter to RMB 5.1 million in the fourth quarter this year, while the total number of policies issued over the full year of 2024 increased from RMB 15.8 million of the prior year to RMB 17.3 million.
As Lei already mentioned, for 141,000 policies and sorry, RMB 1.4 billion of corresponding premiums were embedded in EV deliveries, growing 184% and 171%, respectively, year-over-year. embedded policies and corresponding rate on premiums for the full year of 2024 reached RMB 1.1 million and RMB 3.3 billion, which is USD 452.4 million, respectively, representing growth of 159% for policies embedded and 128% for written premiums compared to the prior year.
In terms of our net revenues, we generated RMB 80 -- sorry, RMB 983.6 million or USD 134.8 million in the fourth quarter, an increase of 13.4% year-over-year, while net revenues for the full year of 2024 increased by 5.2% over the prior year to RMB 3.5 billion or USD 475.8 million. The growth was driven by increase in insurance transactions conducted through our [indiscernible] referral partners and third-party platform partners. The cost of revenues in the quarter was RMB 932 million or USD 127.7 million, up 13% from the prior year quarter.
Cost of revenues increased by 4.8% to RMB 3.3 billion or USD 454.1 million from the prior year. which was consistent with the growth of business volume and net revenues.
We also reported a drop of 20.1% in selling and marketing expenses in the quarter to RMB 19.7 million or USD 2.7 million, primarily due to a decrease in staff costs and lower marketing expenses.
For the full year, selling and marketing expenses decreased 28.7% to RMB 79.5 million or USD 10.9 million from RMB 111.5 million in the prior year.
General and administrative expenses were also lower this quarter, declining 53.2% to RMB 25.7 million or USD 3.5 million from RMB 54.9 million in the prior year quarter, largely due to decreased share-based compensation expenses and partially offset by increase in postal lifting professional service fees and staff costs.
As for the fourth year of 2024, general and administrative expenses decreased by 22.6% to RMB 107.9 million or USD 14.8 million. Research and development expenses decreased to 25.3% in this quarter to RMB 9.3 million or USD 1.2 million. And decreased RMB 33.6 million to RMB 38 million or USD 5.2 million from RMB 57.2 million in the prior year.
The operating loss in this quarter decreased by 93.7% year-over-year to RMB 3 million or USD 0.4 million. If we excluded non-GAAP expenses, the adjusted operating income for this quarter was RMB 1.3 million, which was USD 0.2 million compared to an adjusted operating loss of RMB 12 million in the prior year quarter, which resulted in the growth of our net revenues and the improvement of our operational efficiency. Operating loss for the full year of 2024 decreased by 60.3% year-over-year to RMB 66.5 million or USD 9.1 million.
Excluding non-GAAP expenses, the adjusted operating loss decreased by 40.2% year-over-year to RMB 28.2 million or USD 3.9 million.
Net loss in the quarter also improved 67.4% to RMB 10.4 billion or million, sorry, or USD 1.4 million over the fourth quarter of 2023, while improving 61.6% for the full year to RMB 61.2 million or USD 8.4 million from RMB 159.6 million over the prior year. Adjusted net loss for the quarter improved to RMB 3 million or USD 0.4 million, which is down 38.6% from the adjusted net loss in the prior year quarter. mainly due to foreign exchange losses of RMB 5.3 million. Adjusted net loss was only RMB 24.8 million or USD 3.4 million in 2024, which decreased by 25.3% from RMB 33.2 million for the prior year.
Turning to our balance sheet. We reported RMB 152.9 million or USD 21 million in cash, cash equivalents and short-term investments in the fourth quarter.
Next, looking ahead to our full year, our 2025 guidance.
We expect net revenues to range from RMB 3.6 billion to RMB 3.8 billion, representing an increase of 8.7% to 9.4% compared to the full year of 2024 with total written premiums placed to range from RMB 25.5 billion to RMB 27.0 billion, representing a year-over-year increase of 4.9% to 11.1%. The written premiums placed are expected to range from RMB 7 billion to RMB 8 billion, representing a year-over-year increase of 112% and 142% growth.
We also anticipate our adjusted operating results shifting from a loss to a profit for full year 2025.
I think that concludes our remarks.
Next, we will be happy to take your questions. Thank you.