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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Summary of stock options valuation assumptions

The assumptions used to estimate the fair values of the share options granted are as follows:

		For the years ended December 31,
		2022		2023		2024
Risk-free interest rate		1.52%-3.94%		3.48%-4.61%		3.70%-4.57%
Dividend yield		0%		0%		0%
Expected volatility range		48.20%-56.00%		47.9%-50.69%		47.83%-52.04%
Exercise multiple		2.8		N/A		N/A
Contractual life		10 years		10 years		10 years
Fair market value per ordinary share as at valuation dates		US$0.013-9.29		US$0.93-3.11		US$0.28-0.76

Summary of share options activity

The following table summarizes the share option activities for the year ended December 31, 2024:

		Number of options				Weighted- average exercise price				Weighted- average grant date fair value				Weighted average remaining contractual term				Aggregate intrinsic value
						US$ per option				US$ per option				Years				US$
Outstanding, January 1, 2024			21,005,541				1.7560				7.84				5.61				10,441
Granted			1,395,408				0.0002				0.74
Exercised			(5,173,523	)			0.0002				24.30
Forfeited			(2,287,481	)			1.5826				1.59
Outstanding, December 31, 2024			14,939,945				2.2266				2.43				7.72				4,238
Vested and expected to vest at December 31, 2024			14,939,945				2.2266				2.43				7.72				4,238
Exercisable at December 31, 2024			1,251,990				2.9451				16.82				5.05				901

Summary of restricted shares activities

The following table summarizes the restricted shares unit activities for the year ended December 31, 2024:

		Number of shares				Weighted- average grant date fair value				Weighted average remaining contractual term				Aggregate intrinsic value
						US$ per unit				Years				US$
Outstanding, December 31, 2023			31,330				2.43				8.72				33
Vested			(31,330	)			2.43
Outstanding, December 31, 2024			—				—				—				—
Vested and expected to vest at December 31, 2024			25,267				2.34				7.47				19

Summary of share-based compensation expenses

Total share-based compensation expenses recognized for the years ended December 31, 2022, 2023 and 2024 were as follows:

		For the years ended December 31,
		2022				2023				2024
		RMB				RMB				RMB				US$
Cost of revenues			1,783				2,313				1,869				256
Research and development expenses			52,873				53,474				30,677				4,203
Selling and marketing expenses			8,525				9,658				5,010				686
General and administrative expenses			263,603				195,274				118,066				16,175
			326,784				260,719				155,622				21,320

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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