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GoodWill (Details) ¥ in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2021 CNY (¥)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Goodwill (Line item)
Goodwill	¥ 1,533,485	$ 237,507	¥ 1,533,485	$ 235,017	¥ 1,533,485	¥ 1,419,018
Operating segments	3
Marketing [Member]
Goodwill (Line item)
Goodwill			1,131,154
Carrying amount of goodwill	¥ 1,131,154
Branding [Member]
Goodwill (Line item)
Carrying amount of goodwill	133,523		133,523
Others [Member]
Goodwill (Line item)
Carrying amount of goodwill	¥ 268,808		¥ 268,808

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- Definition

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.

+ References

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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Amount of goodwill allocated to reporting unit with zero or negative amount of net assets.

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