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Income Taxes - Net operating loss carryforward (Details) - Dec. 31, 2019 ¥ in Millions, $ in Millions | CNY (¥) | USD ($)
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforward | ¥ 827.4 | $ 118.8
Net operating tax loss carryforward, expire in 2020 | 29.0 |
Net operating tax loss carryforward, expire in 2021 | 67.3 |
Net operating tax loss carryforward, expire in 2022 | 69.7 |
Net operating tax loss carryforward, expire in 2023 | 222.3 |
Net operating tax loss carryforward, expire in 2024 | ¥ 439.1 |

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- Definition The amount of the net operating tax loss carry forward, which will expire in five years. + References No definition available. + Details
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- Definition The amount of the net operating tax loss carry forward, which will expire in four years. + References No definition available. + Details
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- Definition The amount of the net operating tax loss carry forward, which will expire in one year. + References No definition available. + Details
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- Definition The amount of the net operating tax loss carry forward, which will expire in three years. + References No definition available. + Details
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- Definition The amount of the net operating tax loss carry forward, which will expire in two years. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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