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CONSOLIDATED STATEMENTS OF CASH FLOWS
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Cash flows from operating activities:        
Net (loss)/income ¥ 86,504 $ 12,542 ¥ (127,250) ¥ (82,184)
Adjustment to reconcile net (loss)/income to net cash generated from/(used in) operating activities:        
Depreciation of property, equipment and leasehold improvement 18,056 2,618 19,225 17,677
Amortization of intangible assets 1,202 174 1,686 1,593
Amortization of right-of-use assets 14,557 2,111 10,329 8,569
Foreign exchange losses 1,052 153 738 836
Investment income (331) (48)   (1,241)
Interest expense 217 31   2,395
Share-based compensation 29,233 4,238 37,359 50,741
(Gains)/losses on disposal of property equipment and software 105 15   (28)
Changes in operating assets and liabilities:        
Accounts receivable 3,225 468 1,903 (5,382)
Prepayments and other current assets 4,012 582 (15,935) (4,989)
Accounts payable (26,961) (3,909) 2,526 5,968
Deferred revenue 15,020 2,178 3,656 2,471
Salary and welfare payable 11,505 1,668 29,998 26,393
Taxes payable 537 78 1,691 6,044
Lease liabilities (15,169) (2,199) (8,279) (8,555)
Accrued expenses and other current liabilities (5,997) (869) 2,886 14,277
Other non-current liabilities (500) (72) (959) 5,411
Net cash generated from/(used in) operating activities 136,267 19,759 (40,426) 39,996
Cash flows from investing activities:        
Purchase of property, equipment and leasehold improvement (11,691) (1,695) (20,075) (21,246)
Purchase of intangible assets (149) (22) (855) (1,759)
Purchase of short-term investments (191,022) (27,696)   (86,305)
Maturities of short-term investments 80,000 11,599 73,022 14,505
Net cash received from disposal of property, equipment and leasehold improvement 79 11 9 246
Net cash (used in)/generated from investing activities (122,783) (17,803) 52,101 (94,559)
Cash flows from financing activities:        
Proceeds from issuance of ordinary shares, net     183,188 259,043
Proceeds from exercise of vested share options 5 1 3 2
Proceeds from short-term loans 72,015 10,441 49,248 69,942
Repayments of short-term loans (67,249) (9,750) (19,757) (30,941)
Net cash generated from financing activities 4,771 692 212,682 298,046
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash 22,812 3,306 (6,063) (7,038)
Net increase in cash, cash equivalents and restricted cash 41,067 5,954 218,294 236,445
Cash, cash equivalents and restricted cash at beginning of the year 537,448 77,923 319,154 82,709
Cash, cash equivalents and restricted cash at end of the year 578,515 83,877 537,448 319,154
Supplemental disclosures of cash flow information:        
Cash paid for interest expense (2,227) (323) (3,141) (1,888)
Income taxes paid ¥ (100) $ (15) ¥ (924)  
Accretions to preferred shares redemption value       ¥ 154,066