REVENUE AND SEGMENT INFORMATION - Revenue (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Revenue
Sales of goods		¥ 184,077,018	¥ 188,752,179	¥ 179,785,704
Rendering of services		1,587,246	1,145,304	325,055
Total revenue from contracts with customers (net of value-added tax)		185,664,264	189,897,483	180,110,759
Rental income		329,989	317,915	240,153
Total revenue	$ 28,504,866	¥ 185,994,253	¥ 190,215,398	¥ 180,350,912

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details