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Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-based Payment Arrangement [Abstract]

Summary of RSUs activity under the Share Incentive Plan

The following table summarizes the Company’s RSUs activity under the Plans:

		Number of RSUs				Weighted average grant date fair value				Weighted average remaining contractual life
						(US$)				(Years)
Unvested, December 31, 2019			735,476				4.7523				3.02
Granted			2,363,000				4.2912
Vested			(1,819,726	)			4.1359
Forfeited			—				—
Unvested, December 31, 2020			1,278,750				4.7774				2.68
Granted			4,790,000				10.6200
Vested			(1,949,250	)			9.2469
Forfeited			—				—
Unvested, December 31, 2021			4,119,500				9.4561				2.67
Granted			876,380				1.8800
Vested			(2,034,880	)			7.2254
Forfeited			(283,000	)			7.5431
Unvested, December 31, 2022			2,678,000				8.8740				1.90
Expected to vest as of December 31, 2022			2,678,000

Summary Of Share option Activity

The following table summarizes the Company’s share options activity under the 2015 Plan:

		Number of share options				Weighted average grant date fair value				Weighted average exercise price
						(US$)				(US$)
Outstanding as of January 1 and December 31, 2022			53,737				2.2624				5.8853
Vested and expected to vest as of December 31, 2022			53,737				2.2624				5.8853
Exercisable as of December 31, 2022			53,737				2.2624				5.8853

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The Group calculated the estimated fair value of the share options under the 2015 Plan on the grant date using the Black-Scholes valuation model. Assumptions used to determine the fair value of the share options granted under the 2015 Plan is summarized in the following table:

		For the year ended December 31, 2020
Term in years			5
Volatility			53.73	%
Discount rate			0.85	%
Fair value per ordinary share		US$	5.24

Summary of Share-based Compensation Expenses Relating to RSUs Recognized

Total share-based compensation expenses relating to RSUs and options granted to employees recognized for the years ended December 31, 2020, 2021 and 2022 were as follows:

		For the year ended December 31,
		2020				2021				2022
		RMB				RMB				RMB				US$
Cost of revenues			2,443				—				—				—
Sales and marketing expenses			10,883				18,327				22,125				3,208
General and administrative expenses			14,453				71,147				38,452				5,575
Research and development expenses			27,078				31,657				36,321				5,266
			54,857				121,131				96,898				14,049

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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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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Tabular disclosure of the change in restricted stock units (RSUs).

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