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PROPERTY AND EQUIPMENT, NET - Depreciation expense (Details) - CNY (¥) ¥ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
PROPERTY AND EQUIPMENT, NET
Depreciation expense	¥ 1,066,483	¥ 1,214,168
Cost of revenues
PROPERTY AND EQUIPMENT, NET
Depreciation expense	1,021,616	1,147,638
Sales and marketing expenses
PROPERTY AND EQUIPMENT, NET
Depreciation expense	937	1,377
General and administrative expenses
PROPERTY AND EQUIPMENT, NET
Depreciation expense	23,680	28,189
Research and development expenses
PROPERTY AND EQUIPMENT, NET
Depreciation expense	¥ 20,250	¥ 36,964

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

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-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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