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Property, equipment and software, net - Summary of property, equipment and software, net (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Property, Plant and Equipment [Line Items]
Total property, equipment and software		¥ 12,654	¥ 27,645
Less: accumulated depreciation - Furniture, electronic equipment and vehicles		(4,434)	(3,314)
accumulated amortization - Vehicles		(193)	(188)
accumulated amortization - Software		(809)	(3,435)
accumulated amortization - Leasehold improvement		(1,510)	(348)
Property, equipment and software, net	$ 875	5,708	20,360
Furniture and electronic equipment
Property, Plant and Equipment [Line Items]
Total property, equipment and software		6,373	5,398
Vehicles
Property, Plant and Equipment [Line Items]
Total property, equipment and software		296	425
Software
Property, Plant and Equipment [Line Items]
Total property, equipment and software		1,516	18,948
Leasehold improvement
Property, Plant and Equipment [Line Items]
Total property, equipment and software		¥ 4,469	¥ 2,874

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Accumulated depreciation regarding leasehold improvements.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

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