Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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- Definition

Extension period for statute of limitations under special circumstances, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Period for statute of limitations, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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The statute of limitations period for tax evasion.

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No definition available.

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Period for statute of limitations under related party transaction, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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The amount of underpayment of tax liability specified under special circumstances.

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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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Number of Subsidiaries.

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No definition available.

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- Definition

This element represents for percentage of subject to reduced enterprise income tax rate.

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No definition available.

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Period for tax holiday, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Percentage of tax reduction available to qualifying companies.

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No definition available.

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Period for using reduced tax rate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Income taxes - Tax rates (Details)	12 Months Ended
Income taxes - Tax rates (Details)	Dec. 31, 2022 CNY (¥) subsidiary	Dec. 31, 2022 USD ($) subsidiary	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥) subsidiary
Income taxes
Income tax rate (as a percent)	25.00%	25.00%
Income tax benefit (expense)	¥ 389,357,613	$ 56,451,548	¥ 368,735,701	¥ (299,878,635)
Tax holiday period (in years)	2 years	2 years
Hong Kong
Income taxes
Income tax rate (as a percent)	16.50%	16.50%
Income tax benefit (expense)	¥ 0
Pre tax income	¥ 0		¥ 0	¥ 0
PRC.
Income taxes
Income tax rate (as a percent)	25.00%	25.00%
Percentage of reduced enterprise income tax rate	15.00%	15.00%
Statute of limitations period (in years)	3 years	3 years
Extension period for statute of limitations under special circumstances (in years)	5 years	5 years
Underpayment of tax liability listed as special circumstance	¥ 100,000
Statute of limitations period for related party transaction (in years)	10 years	10 years
Statute of limitations period for tax evasion (in years)	0 years	0 years
PRC. \| Subsidiaries in Shenzhen \| Tax year 2019 to 2021
Income taxes
Income tax rate (as a percent)	15.00%	15.00%
Qualified software enterprise \| PRC.
Income taxes
Number of subsidiary \| subsidiary	1	1
Tax reduction (as a percent)	50.00%	50.00%	50.00%
Tax reduction period (in years)	3 years	3 years
Qualified Enterprise
Income taxes
Number of subsidiary \| subsidiary				1
Income tax rate (as a percent)	15.00%	15.00%