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Income Tax - Schedule of Reconciliations of PRC Statutory Income Tax Rate and Group's Effective Income Tax Rate (Details) - PRC | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Income Taxes [Line Items] |  |
Statutory income tax rate | 25.00% | 25.00%
Share-based compensations | (1.02%) | (1.11%)
Non-deductible expenses | (0.40%) | (0.13%)
Prior year tax filing adjustment | 1.85% | 1.50%
Effect of different tax rate of subsidiary operation in other jurisdictions | (0.52%) | (0.77%)
Preferential tax rate | (8.72%) | (8.92%)
Effect of change in tax rate |  | (7.12%)
Changes in valuation allowance | (16.19%) | (8.45%)
Effective income tax rate | 0.00% | 0.00%

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