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v3.19.1

Summary of Significant Accounting Policies - Intangible assets, net (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Mar. 17, 2014
Property and equipment, net |  |  |  |  |
Residual value of furniture, fixtures and equipment and motor vehicles (as a percent) | 5.00% | 5.00% |  |  |
Impairment of long-lived assets (other than goodwill and intangible assets with indefinite life) |  |  |  |  |
Impairments |  | ¥ 0 | ¥ 0 | ¥ 0 |
Cost of revenues |  |  |  |  |
Inventory write-down | $ 64,115 | 440,823 | 206,733 | 303,233 |
Marketing expenses |  |  |  |  |
Advertising expenses |  | ¥ 1,651,996 | 1,526,815 | 1,671,779 |
Non-compete agreement |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 3 years | 3 years |  |  |
Minimum | Customer relationships |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 4 years | 4 years |  |  |
Minimum | Trademarks |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 2 years | 2 years |  |  |
Minimum | Domain names |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 2 years | 2 years |  |  |
Maximum | Customer relationships |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 14 years | 14 years |  |  |
Maximum | Trademarks |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 5 years | 5 years |  |  |
Maximum | Domain names |  |  |  |  |
Intangible assets, net |  |  |  |  |
Estimated economic life | 3 years | 3 years |  |  |
Notes |  |  |  |  |
Capitalization of interest |  |  |  |  |
Interest rate (as a percent) | 1.50% | 1.50% |  |  | 1.50%
Interest expenses incurred |  | ¥ 165,618 | 97,024 | 99,437 |
Interest expenses capitalized |  | ¥ 5,874 | ¥ 14,589 | ¥ 14,242 |
Buildings |  |  |  |  |
Property and equipment, net |  |  |  |  |
Estimated useful life | 20 years | 20 years |  |  |
Furniture, fixtures and equipment | Minimum |  |  |  |  |
Property and equipment, net |  |  |  |  |
Estimated useful life | 2 years | 2 years |  |  |
Furniture, fixtures and equipment | Maximum |  |  |  |  |
Property and equipment, net |  |  |  |  |
Estimated useful life | 10 years | 10 years |  |  |
Motor vehicles |  |  |  |  |
Property and equipment, net |  |  |  |  |
Estimated useful life | 5 years | 5 years |  |  |
Software |  |  |  |  |
Property and equipment, net |  |  |  |  |
Estimated useful life | 3 years | 3 years |  |  |

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