v3.22.2.2
Additional Information - Condensed Financial Information of the Parent Company - Unaudited condensed statements of cash flows (Details)
¥ in Thousands, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
CNY (¥)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
CNY (¥)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS          
Net cash used in operating activities ¥ (55,372) $ (8,268) ¥ (40,260) ¥ (92,300) ¥ (88,900)
Cash flows from investing activities:          
Net cash generated from /(used in) investing activities (116) (17) 48,880    
Cash flows from financing activities:          
Net cash generated from/(used in) financing activities (2,060) (307) 7,000    
Effect of exchange rate changes on cash and cash equivalents 380 57 (7,127)    
Net increase (decrease) in cash, cash equivalents and restricted cash (57,168) (8,535) 8,493    
Cash, cash equivalents and restricted cash at beginning of the period 97,298 14,526 139,745 139,745  
Cash, cash equivalents and restricted cash at end of the period 40,130 5,991 148,238 97,298 139,745
Parent Company [Member] | Reportable Legal Entities Member          
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS          
Net cash used in operating activities (1,248) (186) (531)    
Cash flows from investing activities:          
Cash paid for investments in subsidiaries, VIEs and subsidiaries of VIEs (31,769) (4,743) (6,463)    
Cash received from maturity of time deposits     45,674    
Net cash generated from /(used in) investing activities (31,769) (4,743) 39,211    
Cash flows from financing activities:          
Net cash generated from/(used in) financing activities 0 0 0    
Effect of exchange rate changes on cash and cash equivalents 1,312 196 (880)    
Net increase (decrease) in cash, cash equivalents and restricted cash (31,705) (4,733) 37,800    
Cash, cash equivalents and restricted cash at beginning of the period 41,811 6,242 46,501 46,501  
Cash, cash equivalents and restricted cash at end of the period ¥ 10,106 $ 1,509 ¥ 84,301 ¥ 41,811 ¥ 46,501