v3.26.1
FINANCIAL INFORMATION OF PARENT COMPANY (CONDENSED BALANCE SHEET) (Details)
$ / shares in Units, ¥ in Thousands, $ in Thousands
Dec. 31, 2025
CNY (¥)
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
CNY (¥)
shares
Dec. 31, 2024
$ / shares
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Current assets:              
Cash and cash equivalents ¥ 907,335 $ 129,747 ¥ 1,289,323   ¥ 2,149,531    
Restricted cash 140,959 20,157 354,991   ¥ 202,764    
Prepayments and other current assets 575,984 82,365 724,091        
Short term investment 1,747,032 249,822 1,271,618        
Amounts due from subsidiaries and VIE 6,235 892 7,021        
Total current assets 6,803,142 972,837 7,214,171        
Non-current assets:              
Total non-current assets 2,887,974 412,975 2,992,830        
TOTAL ASSETS 9,691,116 1,385,812 10,207,001        
Current liabilities:              
Other current liabilities 1,532 219 5,369        
Derivative financial liabilities     130     ¥ 364,800 $ 52,800
Total current liabilities 3,645,164 521,255 3,747,557        
Non-current liabilities:              
Total non-current liabilities 554,360 79,273 678,865        
TOTAL LIABILITIES 4,199,524 600,528 4,426,422        
SHAREHOLDERS' EQUITY              
Additional paid-in capital 4,639,555 663,448 4,646,631        
Treasury shares(14,331,000 and 13,268,625 shares as of December 31, 2024 and 2025, respectively) (90,643) (12,962) (95,502)        
Accumulative deficit (933,885) (133,546) (691,785)        
Accumulated other comprehensive income 27,491 3,931 54,575        
Total shareholders' equity 3,642,619 520,885 3,914,022        
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY ¥ 9,691,116 $ 1,385,812 ¥ 10,207,001        
Ordinary shares:              
Treasury shares (in shares) 13,268,625 13,268,625 14,331,000        
Class A ordinary shares              
SHAREHOLDERS' EQUITY              
Ordinary shares ¥ 93 $ 13 ¥ 95        
Ordinary shares:              
Par value (in dollars per share) | $ / shares   $ 0.0001   $ 0.0001      
Shares authorized (in shares) 470,000,000 470,000,000 470,000,000        
Shares issued (in shares) 174,284,503 174,284,503 175,668,586        
Shares outstanding (in shares) 161,015,878 161,015,878 161,337,586        
Class B ordinary shares              
SHAREHOLDERS' EQUITY              
Ordinary shares ¥ 8 $ 1 ¥ 8        
Ordinary shares:              
Par value (in dollars per share) | $ / shares   $ 0.0001   0.0001      
Shares authorized (in shares) 30,000,000 30,000,000 30,000,000        
Shares issued (in shares) 13,300,738 13,300,738 13,300,738        
Shares outstanding (in shares) 13,300,738 13,300,738 13,300,738        
Parent Company              
Current assets:              
Cash and cash equivalents ¥ 28,719 $ 4,107 ¥ 99,308        
Restricted cash 721 103 46,953        
Prepayments and other current assets 16,862 2,411 23,980        
Short term investment | ¥     177,585        
Amounts due from subsidiaries and VIE 1,354,793 193,733 1,648,067        
Total current assets 1,401,095 200,354 1,995,893        
Non-current assets:              
Investments in subsidiaries and VIE 2,242,020 320,605 1,904,448        
Investments in equity investee 4,560 652 28,433        
Total non-current assets 2,246,580 321,257 1,932,881        
TOTAL ASSETS 3,647,675 521,611 3,928,774        
Current liabilities:              
Other current liabilities 5,056 726 14,660        
Derivative financial liabilities | ¥     92        
Total current liabilities 5,056 726 14,752        
Non-current liabilities:              
Total non-current liabilities        
TOTAL LIABILITIES 5,056 726 14,752        
SHAREHOLDERS' EQUITY              
Additional paid-in capital 4,639,555 663,448 4,646,631        
Treasury shares(14,331,000 and 13,268,625 shares as of December 31, 2024 and 2025, respectively) (90,643) (12,962) (95,502)        
Accumulative deficit (933,885) (133,546) (691,785)        
Accumulated other comprehensive income 27,491 3,931 54,575        
Total shareholders' equity 3,642,619 520,885 3,914,022        
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY ¥ 3,647,675 $ 521,611 ¥ 3,928,774        
Ordinary shares:              
Treasury shares (in shares) 13,268,625 13,268,625 14,331,000        
Parent Company | Class A ordinary shares              
SHAREHOLDERS' EQUITY              
Ordinary shares ¥ 93 $ 13 ¥ 95        
Ordinary shares:              
Par value (in dollars per share) | $ / shares   $ 0.0001   0.0001      
Shares authorized (in shares) 470,000,000 470,000,000 470,000,000        
Shares issued (in shares) 174,284,503 174,284,503 175,668,586        
Shares outstanding (in shares) 161,015,878 161,015,878 161,337,586        
Parent Company | Class B ordinary shares              
SHAREHOLDERS' EQUITY              
Ordinary shares ¥ 8 $ 1 ¥ 8        
Ordinary shares:              
Par value (in dollars per share) | $ / shares   $ 0.0001   $ 0.0001      
Shares authorized (in shares) 30,000,000 30,000,000 30,000,000        
Shares issued (in shares) 13,300,738 13,300,738 13,300,738        
Shares outstanding (in shares) 13,300,738 13,300,738 13,300,738