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Fair value measurement (Tables) | 12 Months Ended
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Dec. 31, 2019
Fair value measurement |
Schedule of assets and liabilities that are measured at fair value on a recurring basis |
|  |  |  |  | Fair value measurement at reporting date using |
Description |  | Fair value as of December 31, 2017 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  |  | 1,372,182 |  |  |  | 1,372,182 |  |  |  | — |  |  |  | — |
Restricted cash |  |  | 4,110,210 |  |  |  | — |  |  |  | 4,110,210 |  |  |  | — |
Short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management products |  |  | 8,582,754 |  |  |  | — |  |  |  | 8,582,754 |  |  |  | — |
Investment securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Listed equity securities |  |  | 10,027,813 |  |  |  | 10,027,813 |  |  |  | — |  |  |  | — |
Total assets |  |  | 24,092,959 |  |  |  | 11,399,995 |  |  |  | 12,692,964 |  |  |  | — |
|  |  |  |  | Fair value measurement at reporting date using |
Description |  | Fair value as of December 31, 2018 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  |  | 1,373 |  |  |  | 1,373 |  |  |  | — |  |  |  | — |
Restricted cash |  |  | 3,239,613 |  |  |  | — |  |  |  | 3,239,613 |  |  |  | — |
Short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management products |  |  | 1,934,820 |  |  |  | — |  |  |  | 1,934,820 |  |  |  | — |
Investment securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Listed equity securities |  |  | 15,901,573 |  |  |  | 15,901,573 |  |  |  | — |  |  |  | — |
Total assets |  |  | 21,077,379 |  |  |  | 15,902,946 |  |  |  | 5,174,433 |  |  |  | — |
|  |  |  |  | Fair value measurement at reporting date using |
Description |  | Fair value as of December 31, 2019 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  |  | 3,590,620 |  |  |  | 3,590,620 |  |  |  | — |  |  |  | — |
Restricted cash |  |  | 2,940,859 |  |  |  | — |  |  |  | 2,940,859 |  |  |  | — |
Short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management products |  |  | 23,206,770 |  |  |  | — |  |  |  | 23,206,770 |  |  |  | — |
Investment securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Listed equity securities |  |  | 21,417,104 |  |  |  | 21,417,104 |  |  |  | — |  |  |  | — |
Total assets |  |  | 51,155,353 |  |  |  | 25,007,724 |  |  |  | 26,147,629 |  |  |  | — |
Schedule of carrying value and fair value of investment securities |
|  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Provision for D ecline in V a lue |  |  | Fair Value |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |
December 31, 2017 |  |  | 9,087,935 |  |  |  | 1,476,834 |  |  |  | (513,047 | ) |  |  | (23,909 | ) |  |  | 10,027,813 |
December 31, 2018 |  |  | 16,071,098 |  |  |  | 3,952,704 |  |  |  | (4,122,229 | ) |  |  | — |  |  |  | 15,901,573 |
December 31, 2019 |  |  | 18,329,057 |  |  |  | 5,008,610 |  |  |  | (1,920,563 | ) |  |  | — |  |  |  | 21,417,104 |

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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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