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LOSS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2019
LOSS PER SHARE |
Schedule of computation of basic and diluted loss per share |
|  | Year Ended December 31,
|  | 2017 |  | 2018 |  | 2019
Net loss attributable to ordinary shareholders |  | (248,580) |  | (380,091) |  | (499,606)
Weighted average number of ordinary shares-basic and diluted |  | 72,000,000 |  | 99,451,210 |  | 163,671,577
Net loss per share-basic and diluted |  | (3.45) |  | (3.82) |  | (3.05)
Summary of share options outstanding excluded from calculation of diluted loss per share |
|  | Year Ended December 31,
|  | 2017 |  | 2018 |  | 2019
Series A Preferred Shares |  | 4,200,000 |  | — |  | —
Series B Preferred Shares |  | 11,396,178 |  | — |  | —
Series C Preferred Shares |  | 31,739,234 |  | — |  | —
Series D Preferred Shares |  | 27,783,584 |  | — |  | —
Share options |  | 5,010,912 |  | 9,997,216 |  | 9,311,906

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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