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Prepaid Expense and Other Assets - Summary of movements in impairment provision (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Impairment Provision on Prepaid Expenses |  |  |
Balance at beginning of the year | ¥ (40,000) | ¥ (39,372) |
Additions | 0 | (1,000) | ¥ (372)
Write-off |  | 372 |
Balance at end of the year | ¥ (40,000) | ¥ (40,000) | ¥ (39,372)

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- Definition Impairment provision on prepayment expenses and other current assets. + References No definition available. + Details
Name: | wdh_ImpairmentProvisionOnPrepaymentExpensesAndOtherCurrentAssets
Namespace Prefix: | wdh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of additions of impairment provision on prepayment expenses and other current assets. + References No definition available. + Details
Name: | wdh_ImpairmentProvisionOnPrepaymentExpensesAndOtherCurrentAssetsAdditions
Namespace Prefix: | wdh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | wdh_ImpairmentProvisionOnPrepaymentExpensesAndOtherCurrentAssetsRollForward
Namespace Prefix: | wdh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of write off of impairment provision on prepayment expenses and other current assets. + References No definition available. + Details
Name: | wdh_ImpairmentProvisionOnPrepaymentExpensesAndOtherCurrentAssetsWriteOff
Namespace Prefix: | wdh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration