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LEASES - Components of Lease Expense (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Components of lease cost
Finance lease cost:- Amortization of right-of-use assets	¥ 423,075	¥ 222,101
Finance lease cost:- Interest on lease liabilities	465,692	299,511
Operating lease cost	195,869	100,469
Short-term lease cost	19,987	5,004
Variable lease cost	(55,599)
Total lease cost	1,049,024	¥ 627,085
Lease concessions granted	55,188
Variable lease cost (credit) recognized for certain finance leases with floating interest rate	¥ 411

X

- Definition

Amount of variable lease cost, net of adjustment, recognized due to change in variable lease costs.

+ References

No definition available.

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X

- Definition

Amount of variable lease cost recognized for certain finance leases with floating interest rate.

+ References

No definition available.

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X

- Definition

Amount of variable lease cost recognized for lease concessions received by the company from certain landlords due to the effects of the COVID-19 pandemic.

+ References

No definition available.

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X

- Definition

Amount of interest expense on finance lease liability.

+ References

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- Definition

Amount of amortization expense attributable to right-of-use asset from finance lease.

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- Definition

Amount of lease cost recognized by lessee for lease contract.

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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X

- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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