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Related Party Transactions - Significant related party transactions (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Tencent Group |  |  |  |
Related Party Transactions |  |  |  |
Services received from related party | $ 330,098 | ¥ 2,298,074 | ¥ 1,266,362 | ¥ 516,014
Suzhou Lebei Network Technology Co., Ltd |  |  |  |
Related Party Transactions |  |  |  |
Services received from related party |  |  |  | ¥ 2,444

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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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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |