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Income Taxes - Net operating loss carryforward (Details) - Dec. 31, 2019 ¥ in Millions, $ in Millions	CNY (¥)	USD ($)
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

X

- 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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X

- 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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X

- 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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X

- 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.

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- References

No definition available.

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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

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