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Related party transactions - Schedule of Relationship Between Related Parties with their Groups (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2021
Chuan Wang |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Chairman and director of the Company (note i)
Shenglong Zou |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Co-founder, director and shareholder of the Company
Weimin Luo |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Director and Chief Operating Officer of the Company (note i)
Shenzhen Crystal Technology Co., Ltd. |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Company owned by a co-founder and director of the Company
Vantage Point Global Limited |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Shareholder of the Company
Aiden & Jasmine Limited |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Shareholder of the Company
Millet Technology Co., Ltd. [Member] |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | (note ii)
Millet Communication Technology Co., Ltd. [Member] |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | (note ii)
Beijing Xiaomi Mobile Software Co., Ltd. ("Beijing Xiaomi Mobile Software") [Member] |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | (note ii)
Beijing Millet Payment Technologies Co., Ltd. ("Beijing Millet Payment Technologies") [Member] |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | (note ii)
Guangzhou Millet Information Service Co Ltd [Member] |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | (note ii)
Shenzhen Xiaomi Technology Co., Ltd. |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | (note ii)
Beijing Itui |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Company owned by the principal shareholder of the Company (note iii)
Itui Online |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Company owned by the principal shareholder of the Company (note iii)
Chizz |  |
Schedule of Other Related Party Transactions [Line Items] |  |
Related parties relationship |  | Company owned by the principal shareholder of the Company (note iii)
Loan amount provided by Xunlei Network to Chizz | $ 20 |
Interest rate | 3.00% |
Debt Instrument, Term | 2 years |

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