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LEASE (Narrative) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2021 USD ($)
Lessor, Lease, Description [Line Items]
Lease receivables	¥ 2,637		¥ 5,018		$ 414
Lease receivables pledged as collaterals for bank and other borrowings	10,056		26,782		1,578
Derecognition of underlying assets	58,058	$ 9,111	179,093
Short-term Lease, Cost	399	63
Secured Debt, Other	405,117		414,470		63,572
Prepaid land lease amortization expenses	416,896	65,420	426,517
Right-of-use asset amortization expenses	9,621	1,510	9,513	¥ 9,462
Failed sale-leaseback transactions as seller-lessee
Sale leaseback liability current	¥ 66,789				$ 10,481
Effective interest rate	4.50%				4.50%
Interest expenses	¥ 39,876	6,257	¥ 44,880	¥ 21,644
Sale leaseback liability non current	344,443				$ 54,051
Cost of revenue [Member]
Lessor, Lease, Description [Line Items]
Short-term Lease, Cost	19,148	3,005
General and Administrative Expense [Member]
Lessor, Lease, Description [Line Items]
Short-term Lease, Cost	¥ 12,382	$ 1,943
Minimum
Failed sale-leaseback transactions as seller-lessee
Effective interest rate	3.43%				3.43%
Maximum
Failed sale-leaseback transactions as seller-lessee
Effective interest rate	11.69%				11.69%

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The amount for the derecognition of underlying assets.

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Amount of amortization expense attributable from finance lease.

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The amount of interest expenses on sale lease back transactions.

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Carrying amount of lease receivables.

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The amount of lessee liability under sale and leaseback transaction which was classified as current.

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The amount of lessee liability under sale and leaseback transaction which was classified as noncurrent.

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The amount of amortization expense on prepaid land lease assets.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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

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