SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Value-added-tax ("VAT") (Details) - CNY (¥) ¥ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Value-added-tax ("VAT")
VAT recoverable	¥ 229,090	¥ 155,620
VAT recoverable	2,218,944	1,445,521
Current assets
Value-added-tax ("VAT")
VAT recoverable	229,090	155,620
Noncurrent assets
Value-added-tax ("VAT")
VAT recoverable	2,218,944	1,445,521
Accrued expenses and other payables
Value-added-tax ("VAT")
VAT payables	¥ 19,251	¥ 6,838

No definition available.

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- Definition

Represents information pertaining to the carrying amount of Value Added Tax Payables as on the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Carrying amount due after one year of the balance sheet date (or one operating cycle), if longer of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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