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Fair Value Measurement - Fair Value Measurements of Company's Long-Term Financial Instruments (Details) - Fixed Income Products - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term investment - held-to-maturity, Carrying Value	¥ 36,816	¥ 121,671
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term investment - held-to-maturity, Fair Value	41,062	144,086
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term investment - held-to-maturity, Fair Value	¥ 41,062	¥ 144,086

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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

No definition available.

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- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
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- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

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-Publisher FASB
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