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v3.3.1.900

Summary of significant accounting policies (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2013 CNY (¥) | Dec. 31, 2015 CNY (¥)
Foreign currency translation |  |  |  |  |
Exchange gains/(losses) | $ (8,860) | ¥ (57,395,000) | ¥ (28,980,000) | ¥ 92,761,000 |
Foreign currency translation adjustments | $ 182,538 | ¥ 1,182,445,000 | (121,612,000) | (137,921,000) |
Convenience translation |  |  |  |  |
Convenience translation rate (RMB to USD) | 6.4778 | 6.4778 |  |  |
Short-term investments |  |  |  |  |
Impairment losses related to short-term investments |  | ¥ 0 | 0 | ¥ 0 |
Construction in progress |  |  |  |  |
Amount of construction in progress | $ 195,590 |  | ¥ 1,928,899,000 |  | ¥ 1,266,992,000
Minimum |  |  |  |  |
Loan receivables, net |  |  |  |  |
Loan periods extended range | 1 day | 1 day |  |  |
Maximum |  |  |  |  |
Loan receivables, net |  |  |  |  |
Loan periods extended range | 6 months | 6 months |  |  |
Electronic equipment |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 3 years | 3 years |  |  |
Office equipment |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 5 years | 5 years |  |  |
Vehicles |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 5 years | 5 years |  |  |
Logistic and warehouse equipment |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 5 years | 5 years |  |  |
Leasehold improvement |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | Over the shorter of the expected life of leasehold improvements or the lease term | Over the shorter of the expected life of leasehold improvements or the lease term |  |  |
Software | Minimum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 3 years | 3 years |  |  |
Software | Maximum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 5 years | 5 years |  |  |
Building |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 40 years | 40 years |  |  |
Building improvement | Minimum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 5 years | 5 years |  |  |
Building improvement | Maximum |  |  |  |  |
Property, equipment and software, net |  |  |  |  |
Estimated useful lives | 10 years | 10 years |  |  |

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