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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Share-Based Compensation

Share Based Compensation Expense by Type of Award

The following table presents the Company’s share-based compensation expense by type of award:

​

​	​	​	​	​	​	​	​	​
​		Years Ended December 31,
​	​	(Amounts in Thousands)
​		2019		2020		2021		2021
​	​	RMB	​	RMB	​	RMB	​	US$
Share options	​	40,533	​	21,837	​	18,081	​	2,837
Non-vested restricted shares	​	54,364	​	37,952	​	32,956	​	5,172
Total share-based compensation	​	94,897	​	59,789	​	51,037	​	8,009

​

Black Scholes Pricing Model Assumptions used to Estimate Fair Value of Options Granted

The Group uses the Black-Scholes pricing model and the following assumptions to estimate the fair value of the options granted:

​

​	​	​	​
​		2021
Average risk-free rate of return		0.8~1.5	%
Weighted average expected option life		6.1~8.4	years
Estimated volatility		42.1~50.4	%
Average dividend yield		Nil

​

Summary of Stock Option Activity

The following table summarizes option activity during the year ended December 31, 2021:

​

​	​	​	​	​	​	​	​	​
​		​		​		Weighted		​
​	​	​	​	Weighted	​	Average	​	Aggregate
​	​	​	​	Average	​	Remaining	​	Intrinsic
​	​	Number of	​	Exercise	​	Contractual	​	Value of
​	​	options	​	Price	​	Term	​	Options
​		​		RMB		Years		RMB
Outstanding as of January 1, 2021	​	224,528	​	505.33	​	5.5	​	17,848
Granted	​	268,006	​	420.41	​	​	​	​
Exercised	​	(37,606)	​	291.73	​	​	​	​
Forfeited or expired	​	(20,960)	​	431.31	​	​	​	​
Outstanding as of December 31, 2021	​	433,968	​	474.97	​	7.9	​	18,389
Exercisable as of December 31, 2021	​	154,661	​	319.84	​	5.4	​	3,663

Summary of Non Vested Restricted Share Activity

A summary of non-vested restricted share activity during the year ended December 31, 2021 is presented below:

​

​	​	​	​	​
​		​		Weighted-
​		Number of		average
​		non-vested		grant-
​		restricted		date fair
Non-vested restricted shares	​	shares		value
​	​	​		RMB
Non-vested as of January 1, 2021		103,373	​	357.43
Granted		120,050	​	399.33
Vested		(57,064)	​	471.41
Forfeited		(15,525)	​	530.50
Non-vested as of December 31, 2021		150,834	​	324.12

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