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Fair Value Measurements - Schedule of the significant unobservable inputs used in the fair value measurement (Detail) - Valuation Technique, Option Pricing Model [Member] - Fair Value, Recurring [Member]
¥ in Thousands
Dec. 31, 2024
CNY (¥)
yr
Dec. 31, 2023
CNY (¥)
yr
Financing Transaction Of Lingdai Investment [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Financing transaction at initial valuation date | ¥ ¥ 31,980 ¥ 31,980
Financing transaction of Fair Value | ¥ 17,981 25,473
Financing Transaction Of Jiayang Investment [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Financing transaction at initial valuation date | ¥ 55,000 55,000
Financing transaction of Fair Value | ¥ 61,426 63,071
Financing Transaction Of Tale Base Investment [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Financing transaction at initial valuation date | ¥ 31,400 31,400
Financing transaction of Fair Value | ¥ ¥ 29,764 ¥ 32,176
Minimum [Member] | Financing Transaction Of Lingdai Investment [Member] | Measurement Input, Revenue Multiple [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 1 1.5
Minimum [Member] | Financing Transaction Of Lingdai Investment [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.50 0.62
Minimum [Member] | Financing Transaction Of Lingdai Investment [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs | yr 1.5 1.5
Minimum [Member] | Financing Transaction Of Jiayang Investment [Member] | Measurement Input, Revenue Multiple [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.2 18
Minimum [Member] | Financing Transaction Of Jiayang Investment [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.40 0.35
Minimum [Member] | Financing Transaction Of Jiayang Investment [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs | yr 1 1
Minimum [Member] | Financing Transaction Of Tale Base Investment [Member] | Measurement Input, Revenue Multiple [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 2.4 3.8
Minimum [Member] | Financing Transaction Of Tale Base Investment [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.38 0.35
Minimum [Member] | Financing Transaction Of Tale Base Investment [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs | yr 1 1
Maximum [Member] | Financing Transaction Of Lingdai Investment [Member] | Measurement Input, Revenue Multiple [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 2.5 2.5
Maximum [Member] | Financing Transaction Of Lingdai Investment [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.60 0.67
Maximum [Member] | Financing Transaction Of Lingdai Investment [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs | yr 2.5 2.5
Maximum [Member] | Financing Transaction Of Jiayang Investment [Member] | Measurement Input, Revenue Multiple [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 1.2 20
Maximum [Member] | Financing Transaction Of Jiayang Investment [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.48 0.40
Maximum [Member] | Financing Transaction Of Jiayang Investment [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs | yr 3 3
Maximum [Member] | Financing Transaction Of Tale Base Investment [Member] | Measurement Input, Revenue Multiple [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 3 4.3
Maximum [Member] | Financing Transaction Of Tale Base Investment [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs 0.42 0.40
Maximum [Member] | Financing Transaction Of Tale Base Investment [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Key unobservable inputs | yr 2 1.5