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SHARE-BASED PAYMENTS (Tables)

12 Months Ended

Dec. 31, 2023

SHARE-BASED PAYMENTS

Schedule of the option activities under the 2020 Plan

​

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	Weighted‑	​	​
​	​	​	​	Weighted‑	​	Weighted‑	​	average	​	​
​	​	​	​	average	​	average	​	remaining	​	Aggregate
​	​	Number of	​	exercise	​	grant‑date	​	contractual	​	intrinsic
​		options		price		fair value		term		value
​		​		US$		US$		Years		US$ in thousands
Outstanding, December 31, 2022		15,452,601	​	0.15	​	1.01	​	7.86	​	6,157
Forfeited		(308,022)	​	0.17	​	1.05	​	​	​	​
Exercised		(83,690)	​	0.16	​	​	​	​	​	​
Outstanding, December 31, 2023		15,060,889	​	0.15	​	1.01	​	6.87	​	7,396
Vested and expected to vest at December 31, 2023		15,060,889	​	0.15	​	1.01	​	6.87	​	7,396
Exercisable at December 31, 2023		10,519,075	​	0.17	​	1.18	​	6.58	​	5,048

Schedule of the assumptions used to estimate the fair value of the options granted

​

​	​	​	​
​		For the year ended
​	​	December 31, 2022	​
Fair value per ordinary share as at valuation date		US$0.41	​
Risk‑free rate		3.44%	​
Expected volatility		71.71%	​
Exercise multiple		2.2 — 2.8	​

Schedule of the amount of share-based compensation expense included in each of the relevant financial statement line items

​

​	​	​	​	​	​	​	​	​
​	​	For the year ended
​	​	December 31,
​	​	2021	​	2022	​	2023	​	2023
​		RMB		RMB		RMB		US$
​	​	(in thousands)
Cost of revenues	​	940	​	348	​	299	​	42
Research and development expenses	​	5,431	​	6,377	​	4,055	​	571
Sales and marketing expenses		3,010	​	1,599	​	707	​	100
General and administrative expenses		5,794	​	4,720	​	4,374	​	616
​		15,175	​	13,044	​	9,435	​	1,329

​

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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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