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EARNINGS (LOSSES) PER SHARE - Computation of diluted earnings (Details) - shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
EARNINGS (LOSSES) PER SHARE      
Securities which could potentially dilute basic earnings per share which were excluded from the computation of diluted earnings per share 197,540,150 280,523,900 297,781,490
Outstanding employee options and nonvested restricted stocks      
EARNINGS (LOSSES) PER SHARE      
Securities which could potentially dilute basic earnings per share which were excluded from the computation of diluted earnings per share 76,939,150 53,696,490 70,954,080
Shares of convertible senior notes      
EARNINGS (LOSSES) PER SHARE      
Securities which could potentially dilute basic earnings per share which were excluded from the computation of diluted earnings per share 120,601,000 226,827,410 226,827,410