v3.26.1
ORGANIZATION, CONSOLIDATION AND PRINCIPAL ACTIVITIES - Balance sheets (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Current assets            
Cash and cash equivalents ¥ 1,151,120 $ 164,608 ¥ 1,123,292      
Short-term investments     45,457      
Accounts receivable, net of allowance of RMB5,565 and RMB554 (US$79) as of December 31, 2024 and 2025, respectively 47,070 6,731 52,030      
Inventories, net 21,388 3,058 23,475      
Amounts due from related parties (including amounts due from Group entities of RMB118,806 and RMB171,522 (US$23,498) as of December 31, 2023 and 2024, respectively) 4,314 617 2,051      
Prepayments and other current assets 74,483 10,651 89,512      
Total current assets 1,298,375 185,665 1,335,817      
Noncurrent assets            
Property and equipment, net 2,563 367 3,476      
Intangible assets, net 17,634 2,522 16,429      
Operating lease right-of-use assets 11,586 1,657 14,885      
Long-term investment 26,333 3,766 26,333      
Other noncurrent assets 11,864 1,696 22,701      
Total noncurrent assets 69,980 10,008 83,824      
Total assets 1,368,355 195,673 1,419,641      
Current liabilities            
Accounts payable 25,083 3,587 30,233      
Deferred revenue and customer advances 219,913 31,447 283,251      
Amounts due to related parties (including amounts due to Group entities of RMB4,943 and RMB403 (US$55) as of December 31, 2023 and 2024, respectively) 1,066 152 1,734      
Accrued expenses and other current liabilities 115,749 16,552 126,501      
Current operating lease liabilities 2,166 310 3,661      
Total current liabilities 363,977 52,048 447,544      
Non-current liabilities            
Non-current operating lease liabilities 9,208 1,317 11,252      
Total non-current liabilities 9,208 1,317 11,252      
Total liabilities 373,185 53,365 458,796      
Allowance for credit losses 555 79 5,569 $ 796 ¥ 5,926 ¥ 5,407
Related Party            
Current assets            
Amounts due from related parties (including amounts due from Group entities of RMB118,806 and RMB171,522 (US$23,498) as of December 31, 2023 and 2024, respectively) 4,314 617 2,051      
Current liabilities            
Amounts due to related parties (including amounts due to Group entities of RMB4,943 and RMB403 (US$55) as of December 31, 2023 and 2024, respectively) 1,066 152 1,734      
VIE            
Current assets            
Cash and cash equivalents 781,825 111,799 698,463      
Short-term investments     30,900      
Accounts receivable, net of allowance of RMB5,565 and RMB554 (US$79) as of December 31, 2024 and 2025, respectively 43,985 6,290 48,375      
Inventories, net 21,808 3,119 23,957      
Prepayments and other current assets 68,424 9,785 81,395      
Total current assets 1,108,715 158,545 1,056,082      
Noncurrent assets            
Property and equipment, net 2,468 353 3,298      
Intangible assets, net 16,552 2,367 15,269      
Operating lease right-of-use assets 11,372 1,626 14,885      
Long-term investment 26,333 3,766 26,333      
Other noncurrent assets 11,242 1,608 21,345      
Total noncurrent assets 67,967 9,720 81,130      
Total assets 1,176,682 168,265 1,137,212      
Current liabilities            
Accounts payable 24,706 3,533 26,632      
Deferred revenue and customer advances 218,375 31,227 280,705      
Accrued expenses and other current liabilities 91,935 13,147 100,213      
Current operating lease liabilities 2,166 310 3,661      
Total current liabilities 339,756 48,585 413,176      
Non-current liabilities            
Non-current operating lease liabilities 9,208 1,317 11,252      
Total non-current liabilities 9,208 1,317 11,252      
Total liabilities 348,964 49,902 424,428      
Allowance for credit losses 554 79 5,565      
Net asset 827,718 118,363 712,784      
VIE | Related Party            
Current assets            
Amounts due from related parties (including amounts due from Group entities of RMB118,806 and RMB171,522 (US$23,498) as of December 31, 2023 and 2024, respectively) 192,673 27,552 172,992      
Current liabilities            
Amounts due to related parties (including amounts due to Group entities of RMB4,943 and RMB403 (US$55) as of December 31, 2023 and 2024, respectively) 2,574 368 1,965      
VIE | Affiliated Entity            
Current assets            
Amounts due from related parties (including amounts due from Group entities of RMB118,806 and RMB171,522 (US$23,498) as of December 31, 2023 and 2024, respectively) 188,904 27,013 171,522      
Current liabilities            
Amounts due to related parties (including amounts due to Group entities of RMB4,943 and RMB403 (US$55) as of December 31, 2023 and 2024, respectively) 1,639 $ 234 403      
VIE | Asset pledged as collateral without right            
Noncurrent assets            
Total assets ¥ 0   ¥ 0