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Significant accounting policies (Details) - Schedule of estimated useful lives	12 Months Ended
	Dec. 31, 2020
Significant accounting policies (Details) - Schedule of estimated useful lives [Line Items]
Leasehold improvements	Shorter of the lease term and the estimated useful lives of the assets
Building [Member]
Significant accounting policies (Details) - Schedule of estimated useful lives [Line Items]
Estimated Useful Lives	20 years
Motor vehicles [Member]
Significant accounting policies (Details) - Schedule of estimated useful lives [Line Items]
Estimated Useful Lives	5 years
Equipment, fixture and furniture, and other fixed assets [Member] | Minimum [Member]
Significant accounting policies (Details) - Schedule of estimated useful lives [Line Items]
Estimated Useful Lives	2 years
Equipment, fixture and furniture, and other fixed assets [Member] | Maximum [Member]
Significant accounting policies (Details) - Schedule of estimated useful lives [Line Items]
Estimated Useful Lives	10 years

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- References

No definition available.

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- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

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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.

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