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DERIVATIVE FINANCIAL INSTRUMENTS - Balance sheet location (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)
DERIVATIVE FINANCIAL INSTRUMENTS
Interest rate swap contracts		¥ 10,408
Interest rate swap contracts
DERIVATIVE FINANCIAL INSTRUMENTS
Derivative, Notional Amount | $	$ 0		$ 118,500
Interest rate swap contracts | Not designated as hedging instrument | Accrued expenses and other payables
DERIVATIVE FINANCIAL INSTRUMENTS
Interest rate swap contracts		351
Interest rate swap contracts | Not designated as hedging instrument | Other long-term liabilities
DERIVATIVE FINANCIAL INSTRUMENTS
Interest rate swap contracts		¥ 10,408

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

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