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Other receivable (Details) - Nov. 05, 2021 - Shanghai Jiaoda Onlly Co Ltd [Member]
¥ in Millions, $ in Millions
CNY (¥)
item
USD ($)
item
Business Acquisition [Line Items]    
Total consideration transferred ¥ 509.6 $ 80.4
Deposit prepaid for acquisition ¥ 50.0 $ 7.9
Percentage of equity interest agreed to acquire 15.97% 15.97%
Number of third parties with whom the Equity Transfer Framework Agreement was made 4 4
Interest on deposit prepaid for acquisition (in percent) 6.50% 6.50%