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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Summary Financial Information of VIEs and their Subsidiaries | The following financial information of the VIEs and their subsidiaries as of December 31, 2021 and 2022 and for each of the three years in the period ended December 31, 2022 was included in the accompanying consolidated financial statements after elimination of intercompany transactions and balances within the Company, its subsidiaries, the VIEs and VIEs' subsidiaries:
|  | As of December 31, |
|  | 2021 |  |  | 2022 |
|  | RMB |  |  | RMB |
Cash, cash equivalents and restricted cash |  |  | 64,896 |  |  |  | 152,215 |
Short-term investments |  |  | 59,105 |  |  |  | 68,440 |
Prepaid expenses and other current assets |  |  | 54,235 |  |  |  | 47,948 |
Total current assets |  |  | 208,932 |  |  |  | 284,328 |
Property and equipment, net |  |  | 229,855 |  |  |  | 220,249 |
Right-of-use assets |  |  | 291,492 |  |  |  | 274,643 |
Total non-current assets |  |  | 660,990 |  |  |  | 617,828 |
Total assets |  |  | 869,922 |  |  |  | 902,156 |
Accrued expenses and other current liabilities |  |  | 197,467 |  |  |  | 191,172 |
Deferred revenue, current |  |  | 295,958 |  |  |  | 374,208 |
Lease liabilities, current |  |  | 8,366 |  |  |  | 17,065 |
Total current liabilities |  |  | 501,791 |  |  |  | 582,445 |
Deferred revenue, non-current |  |  | 257,071 |  |  |  | 251,080 |
Lease liabilities, non-current |  |  | 318,598 |  |  |  | 316,844 |
Total liabilities |  |  | 1,080,735 |  |  |  | 1,152,554 |
As of December 31, 2021 and 2022, the VIEs and VIEs' subsidiaries accounted for an aggregate of 33.6% and 39.6% of the Group's consolidated total assets, respectively, and 30.0% and 43.4% of the Group's consolidated total liabilities, respectively.
|  | Years ended December 31, |
|  | 2020 |  |  | 2021 |  |  | 2022 |
|  | RMB |  |  | RMB |  |  | RMB |
Net revenues |  |  | 1,042,693 |  |  |  | 537,273 |  |  |  | 1,076,379 |
Net (loss)/income |  |  | (446,621 | ) |  |  | (183,346 | ) |  |  | 376,082 |
Net cash (used in)/generated from operating activities |  |  | (1,663,110 | ) |  |  | (514,536 | ) |  |  | 502,168 |
Net cash (used in)/generated from investing activities |  |  | (214,045 | ) |  |  | 177,164 |  |  |  | (11,166 | )
Net cash generated from financing activities |  |  | — |  |  |  | — |  |  |  | — |
Summary of Estimated Useful Lives of Property and Equipment | Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:
Category |  | Estimated useful life
Buildings |  | 36-40 years
Leasehold and buildings improvements |  | Shorter of lease term or expected useful life
Electronic and office equipment |  | 3-5 years
Summary of Estimated Useful Lives of Intangible Assets | Intangible assets are amortized using the straight-line basis over the estimated useful lives as follows:
Category |  | Estimated useful life
Computer software |  | 3 years
License |  | 5 years

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