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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2019
Fair Value Measurements |
Schedule of financial instruments measured at fair value on a recurring basis by level within the fair value hierarchy | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurements
​ | ​ | Quoted Price in | ​ | Significant | ​ | ​
​ | ​ | Active Market | ​ | Other | ​ | Unobservable
​ | ​ | for Identical |  | Observable |  | Inputs
​ | ​ | Assets (Level 1) |  | Inputs (Level 2) | ​ | (Level 3)
​ |  | RMB |  | RMB |  | RMB
Recurring | ​ |  |  |  |  |
As of December 31, 2019: | ​ | ​ | ​ | ​ | ​ | ​
Short-term investments: | ​ | ​ | ​ | ​ | ​ | ​
Debt securities: | ​ | ​ | ​ | ​ | ​ | ​
Trading | ​ | — | ​ | 795,849 | ​ | —
Equity securities: | ​ | ​ | ​ | ​ | ​ | ​
Marketable | ​ | 11,925 | ​ | — | ​ | —
​ | ​ | 11,925 |  | 795,849 |  | —
Schedule of fair value instruments on unobservable input reconciliation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurements
​ | ​ | Quoted Price in | ​ | Significant | ​ | ​
​ | ​ | Active Market | ​ | Other | ​ | Unobservable
​ | ​ | for Identical | ​ | Observable | ​ | Inputs
​ | ​ | Assets (Level 1) | ​ | Inputs (Level 2) | ​ | (Level 3)
​ |  | RMB |  | RMB |  | RMB
As of December 31, 2018: | ​ | ​ | ​ | ​ |  | ​
Short term investments: | ​ | ​ | ​ | ​ |  | ​
Debt securities: | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity | ​ | — | ​ | 7,630,689 |  | —
As of December 31, 2019: | ​ | ​ | ​ | ​ |  | ​
Short-term investments: | ​ | ​ | ​ | ​ | ​ | ​
Debt securities: | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity | ​ | — | ​ | 34,481,053 |  | —
Convertible bonds | ​ | — | ​ | 8,037,280 |  | —

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- Definition Tabular disclosure of the fair value measurement of instruments using significant unobservable inputs + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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