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Other current assets - Allowance for other current assets (Details) | 12 Months Ended
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Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥)
Other current assets |  |  |
Balance at the beginning of the year | ¥ 116,860,992 | $ 16,009,890 | ¥ 256,349,242
Additions/(reversal) | (15,572,138) | (2,133,374) | 29,879,226
Charge-offs | (28,617,809) | (3,920,624) | (169,367,476)
Balance at the end of the year | ¥ 72,671,045 | $ 9,955,892 | ¥ 116,860,992

X
- Definition Amount of additions (reversals) on allowance for other current asset. + References No definition available. + Details
Name: | qd_AdditionsReversalsOnAllowanceForOtherCurrentAsset
Namespace Prefix: | qd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of allowance for other current assets. + References No definition available. + Details
Name: | qd_AllowanceForOtherCurrentAssets
Namespace Prefix: | qd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of charge on allowance for other current asset . + References No definition available. + Details
Name: | qd_ChargeOnAllowanceForOtherCurrentAsset
Namespace Prefix: | qd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | qd_OtherCurrentAssetsAbstract
Namespace Prefix: | qd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration