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CONSOLIDATED BALANCE SHEETS (Parenthetical)
¥ in Thousands, $ in Thousands
Dec. 31, 2021
CNY (¥)
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
CNY (¥)
shares
Accounts receivable, net of allowances ¥ 37,690 $ 5,914 ¥ 43,820
Accounts payable 18,292 2,870 16,592
Deferred revenue and customer deposits 80,405 12,617 71,141
Accrued liabilities and other current liabilities 85,305 13,388 109,136
Amount due to related parties 54 8
Other non-current liabilities 2,607 409  
Deferred revenue ¥ 3,845 $ 603 ¥ 6,049
Class A Common Shares      
Common shares, par value per share | $ / shares   $ 0.0001  
Common shares, shares authorized 4,920,000,000 4,920,000,000 4,920,000,000
Common shares, shares issued 62,036,273 62,036,273 61,392,170
Common shares, shares outstanding 62,036,273 62,036,273 61,392,170
Class B Common Shares      
Common shares, par value per share | $ / shares   $ 0.0001  
Common shares, shares authorized 30,000,000 30,000,000 30,000,000
Common shares, shares issued 17,000,189 17,000,189 17,000,189
Common shares, shares outstanding 17,000,189 17,000,189 17,000,189
VIE      
Accounts payable ¥ 17,529 $ 2,751 ¥ 16,564
Deferred revenue and customer deposits 115,900 18,187 104,681
Accrued liabilities and other current liabilities 64,527 10,126 66,772
Amount due to related parties 54 8
Other non-current liabilities 560 88
Deferred revenue ¥ 569 $ 89 ¥ 561