XML 110 R81.htm IDEA: XBRL DOCUMENT v3.21.1
PROPERTY AND EQUIPMENT, NET - Depreciation (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Depreciation expense      
Depreciation of property and equipment ¥ 1,543,130 ¥ 1,057,171 ¥ 682,451
Cost of revenue      
Depreciation expense      
Depreciation of property and equipment 1,418,846 1,045,446 674,560
General and administrative expenses      
Depreciation expense      
Depreciation of property and equipment 120,604 10,448 7,319
Research and development expenses      
Depreciation expense      
Depreciation of property and equipment ¥ 3,680 ¥ 1,277 ¥ 572