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Summary of significant accounting policies - Property and equipment and Intangible assets (Details)	Dec. 31, 2023
Software
Summary of significant accounting policies
Intangible assets, estimated useful life	3 years
Software license rights
Summary of significant accounting policies
Intangible assets, estimated useful life	3 years
Patent
Summary of significant accounting policies
Intangible assets, estimated useful life	3 years
Trademarks
Summary of significant accounting policies
Intangible assets, estimated useful life	10 years
Machinery and electronic equipment | Minimum
Summary of significant accounting policies
Property and equipment, estimated useful life	3 years
Machinery and electronic equipment | Maximum
Summary of significant accounting policies
Property and equipment, estimated useful life	10 years
Transportation vehicles
Summary of significant accounting policies
Property and equipment, estimated useful life	4 years
Office and other equipment
Summary of significant accounting policies
Property and equipment, estimated useful life	5 years

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ 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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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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- Details

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