Related Party Transactions - Summary of Key Management Personnel Compensation (Parenthetical) (Details) ¥ in Millions	6 Months Ended
Jun. 30, 2022 CNY (¥)
Related Party Transactions [Abstract]
Share-based compensation expense from forfeiture of unvested stock options	¥ 4.4

Key management personnel compensation, share-based payment from forfeiture of unvested stock options.

No definition available.

Name:	cntb_KeyManagementPersonnelCompensationShareBasedPaymentFromForfeitureOfUnvestedStockOptions
Namespace Prefix:	cntb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration