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TAXATION - Tax holiday (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
TAXATION      
Tax holiday effect ¥ 115,521 ¥ 141,554 ¥ 108,213
Basic net income per share effect ¥ 0.03 ¥ 0.04 ¥ 0.05
Diluted net income per share effect ¥ 0.03 ¥ 0.04 ¥ 0.05
Denominator for basic net income (loss) per share-weighted average ordinary shares outstanding 3,569,179 3,549,122 2,226,265
Denominator for diluted net income (loss) per share-weighted average ordinary shares outstanding 3,569,179 3,549,122 2,267,331