SHARE-BASED PAYMENT - Schedule of Effective Time Fair Value of the Stock Options was Determined Using the BLM (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Number of Shares
Number of shares, outstanding at beginning (in shares)	36,091,071
Number on non-vested shares, grant (in shares)	640,000
Number of shares, forfeited (in shares)	(3,854,389)
Number of shares, outstanding at ending (in shares)	32,876,682	36,091,071
Number of shares, expected to vest and exercisable (in shares)	32,876,682
Number of shares, exercisable (in shares)	21,366,586
Weighted Average Exercise Price (US$)
Weighted average exercise price, outstanding at beginning (in dollars per share)	$ 6.08
Weighted average grant date fair value per share, non-vested shares, grant (in dollars per share)	1.77
Weighted average exercise price, forfeited (in dollars per share)	5.93
Weighted average exercise price, outstanding at ending (in dollars per share)	6.01	$ 6.08
Weighted average exercise price, expected to vest and exercisable (in dollars per share)	6.01
Weighted average exercise price, exercisable (in dollars per share)	6.11
Weighted Average Grant Date Fair Value (US$)
Weighted average grant date fair value, outstanding at beginning (in dollars per share)	4.80
Weighted average grant date fair value, granted (in dollars per share)	1.18
Weighted average grant date fair value, forfeited (in dollars per share)	4.79
Weighted average grant date fair value, outstanding at ending (in dollars per share)	4.73	$ 4.80
Weighted average grant date fair value, expected to vest and exercisable (in dollars per share)	4.73
Weighted average grant date fair value, exercisable (in dollars per share)	$ 4.85
Weighted Average Remaining Contractual
Weighted average remaining contractual, outstanding	5 years 8 months 12 days	6 years 9 months 18 days
Weighted average remaining contractual life, expected to vest and exercisable	5 years 8 months 12 days
Weighted average remaining contractual life, exercisable	5 years 9 months 18 days