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ACQUISITION - Jinghan Taihe (Details) - Ten Tutoring Centers controlled by Beijing Xinganxian ¥ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 28, 2019 item	Jun. 30, 2020 item	Dec. 31, 2020 CNY (¥)
Business Acquisition [Line Items]
Number of branches	10
Agreement tenure	10 years
Number of schools under the branch companies	10
Renewal term	10 years
Long Term Accounts Receivable And Other Receivables, Valuation Input, Discount Rate			17.00%
Number of tutoring centers closed		4
Impairment loss of goodwill, recognized | ¥			¥ 20,911

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- Definition

The discount rate used to value long term accounts receivable and other receivables.

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- Definition

Number of branches.

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- Definition

Represents the number of schools under the branch companies.

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- Definition

Represents the number of tutoring centers closed.

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- Definition

The number of years the contract can be renewed as per agreement.

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- Definition

The number of years in contract as agreed.

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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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- Definition

Amount after tax of loss recognized that results from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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No definition available.

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