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Prepayments and other current assets - Schedule of Prepayment and Other Current Assets (Parenthetical) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥)
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |  |
Impairment charges | ¥ 528 | $ 83 | ¥ 4,500 | ¥ 0

X
- Definition Impairment for loans receivables. + References No definition available. + Details
Name: | jg_ImpairmentForLoansReceivables
Namespace Prefix: | jg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration