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v3.19.1

Summary of significant accounting policies (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2018 CNY (¥)
Foreign currency translation |  |  |  |  |
Total exchange gains/(losses) | $ (27,997) | ¥ (192,491,000) | ¥ 213,482,000 | ¥ (143,125,000) |
Total foreign currency translation adjustments gains/(losses) | $ 392,231 | 2,696,784,000 | (822,052,000) | 943,616,000 |
Convenience translation |  |  |  |  |
Convenience translation rate (RMB to USD) | 6.8755 |  |  |  | 6.8755
Loan receivables, net |  |  |  |  |
Provision for the doubtful loan receivables |  | 0 | 0 |  |
Construction in progress |  |  |  |  |
Amount of construction in progress | $ 953,198 |  | 3,196,516,000 |  | ¥ 6,553,712,000
Others, net |  |  |  |  |
Foreign currency translation |  |  |  |  |
Total exchange gains/(losses) |  | ¥ (192,491,000) | 213,482,000 | ¥ (143,125,000) |
Minimum |  |  |  |  |
Loan receivables, net |  |  |  |  |
Loan periods extended range | 1 month | 1 month |  |  |
Maximum |  |  |  |  |
Loan receivables, net |  |  |  |  |
Loan periods extended range | 24 months | 24 months |  |  |
Electronic equipment | Minimum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 3 years | 3 years |  |  |
Electronic equipment | Maximum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 5 years | 5 years |  |  |
Office equipment |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 5 years | 5 years |  |  |
Vehicles |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 5 years | 5 years |  |  |
Logistic and warehouse equipment | Minimum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 5 years | 5 years |  |  |
Logistic and warehouse equipment | Maximum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 10 years | 10 years |  |  |
Software | Minimum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 3 years | 3 years |  |  |
Software | Maximum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 5 years | 5 years |  |  |
Building |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 40 years | 40 years |  |  |
Building improvement | Minimum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 5 years | 5 years |  |  |
Building improvement | Maximum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful Lives (in Years) | 10 years | 10 years |  |  |
Other non-current assets |  |  |  |  |
Loan receivables, net |  |  |  |  |
Loan receivables |  |  | ¥ 243,624,000 |  | ¥ 105,455,000

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