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Operations - Contractual agreements with major VIEs (Details) - VIEs [Member] - Exclusive Technology Consulting and Services Agreements [Member] - The Company or its relevant subsidiaries [Member] | Dec. 23, 2020 | Dec. 22, 2020
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Contractual agreements with major VIEs |  |
Term of agreement |  | 10 years
Termination notice before the term ends | 30 days | 90 days

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- Definition Period of agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Period of termination notice before the term ends, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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 -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 + Details
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