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Deferred government grant (Narrative) (Details) - 12 months ended Dec. 31, 2017 ¥ in Millions | USD ($) | CNY (¥)
--- | --- | ---
Deferred Government Grant 1 | ¥ |  | ¥ 150.0
Deferred Government Grant 2 | $ 23,103,427 |
Deferred Government Grant 3 | 1,004,027 |
Deferred Government Grant 4 | ¥ |  | ¥ 46.2
Deferred Government Grant 5 | 7,100,000 |
Deferred Government Grant 6 | 201,847 |
Deferred Government Grant 7 | 36,183 |
Deferred Government Grant 8 | $ 146,311 |

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