Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Goodwill and Intangible assets - Addtional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2022 USD ($)	Mar. 08, 2022 CNY (¥)	Mar. 08, 2022 USD ($)
Goodwill	¥ 37,785,000		¥ 0		$ 5,478
Impairment Of Goodwill	0
Impairment charges	0		0	¥ 0
Amortization of intangible assets	6,043,000	$ 876	4,481,000	¥ 4,366,000
Intangible assets with an indefinite useful life	0		¥ 0
Send Cloud [Member]
Goodwill	¥ 37,785,000				$ 5,478	¥ 37,785,000	$ 5,478
Computer software and systems
Weighted average useful life of intangible assets	6 years	6 years	4 years	3 years 10 months 24 days