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Summary of Significant Accounting Policies - Schedule of Significant Balance of Accounts Receivable (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Falikang - Related Party [Member]    
Accounting Policy [Line Items]    
Concentration risk, percentage 42.00% 65.00%
AstraZeneca Agreements [Member]    
Accounting Policy [Line Items]    
Concentration risk, percentage 33.00% 16.00%