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Financial Assets and Financial Liabilities - Schedule of Foreign Currency Risk (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
US | Change in Exchange Rate +5%      
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]      
Change in exchange rate 5.00% 5.00% 5.00%
Effect on profit (loss) before tax ¥ 1,606 ¥ (608)  
US | Change in Exchange Rate -5%      
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]      
Change in exchange rate 5.00% 5.00% 5.00%
Effect on profit (loss) before tax ¥ (1,606) ¥ 608 ¥ 1,302
HK | Change in Exchange Rate +5%      
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]      
Change in exchange rate 5.00% 5.00% 5.00%
Effect on profit (loss) before tax     ¥ 1,672
HK | Change in Exchange Rate -5%      
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]      
Change in exchange rate 5.00% 5.00% 5.00%
Effect on profit (loss) before tax     ¥ (1,672)