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FAIR VALUE MEASUREMENT (Details) - CNY (¥) ¥ in Thousands	Dec. 31, 2020	Dec. 31, 2019
FAIR VALUE MEASUREMENT
Convertible bonds payable fair value	¥ 3,683,816	¥ 2,448,646
Fair Value, Measurements, Recurring
FAIR VALUE MEASUREMENT
Liability measured at fair value		¥ 10,759

X

- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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