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Property, Equipment and Software, Net - Depreciation expenses (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Property, Equipment and Software, Net |  |  |  |
Depreciation expenses | $ 2,600 | ¥ 18,098 | ¥ 5,934 | ¥ 2,265
Costs of revenues |  |  |  |
Property, Equipment and Software, Net |  |  |  |
Depreciation expenses | 518 | 3,603 | 1,291 | 553
Sales and marketing expenses |  |  |  |
Property, Equipment and Software, Net |  |  |  |
Depreciation expenses | 347 | 2,415 | 805 | 546
General and administrative expenses |  |  |  |
Property, Equipment and Software, Net |  |  |  |
Depreciation expenses | 273 | 1,901 | 1,074 | 181
Research and development expenses |  |  |  |
Property, Equipment and Software, Net |  |  |  |
Depreciation expenses | $ 1,462 | ¥ 10,179 | ¥ 2,764 | ¥ 985

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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