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Income Taxes - Tax rates (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2018 | Apr. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes |  |  |  |  |
Statutory tax rate (as a percent) |  |  | 25.00% | 25.00% | 25.00%
Hong Kong |  |  |  |  |
Income Taxes |  |  |  |  |
Statutory tax rate (as a percent) |  |  | 16.50% |  |
Withholding tax rate (as a percent) |  |  | 0.00% |  |
PRC |  |  |  |  |
Income Taxes |  |  |  |  |
Statutory tax rate (as a percent) |  |  | 25.00% |  |
Withholding tax rate (as a percent) |  |  | 10.00% |  |
Xinzhijiang | PRC |  |  |  |  |
Income Taxes |  |  |  |  |
Preferential tax rate (as a percent) |  | 15.00% |  |  |
Shanghai Xunmeng | PRC |  |  |  |  |
Income Taxes |  |  |  |  |
Preferential tax rate (as a percent) | 15.00% |  |  |  |

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- Definition Withholding income tax rate on dividends, interests, rent or royalties payable by the Company's PRC subsidiaries, to non-PRC resident enterprises, and proceeds from any such non-resident enterprise investor's disposition of assets (after deducting the net value of such assets). + References No definition available. + Details
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