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Land Use Right - Schedule of Land Use Right (Details) - USD ($) | Dec. 31, 2025 | Dec. 31, 2024
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Schedule of Land Use Right [Abstract] |  |
Land use right | $ 426,326 | $ 386,884
Less: Accumulated amortization | (86,471) | (71,172)
Land use right, net | $ 339,855 | $ 315,712

X
- Definition The Amount of Accumulated Amortization of Land Use Right. + References No definition available. + Details
Name: | wff_AccumulatedAmortizationOfLandUseRight
Namespace Prefix: | wff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of Land Use Rights. + References No definition available. + Details
Name: | wff_LandUseRight
Namespace Prefix: | wff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The Amount of Land Use Right. + References No definition available. + Details
Name: | wff_LandUseRightNet
Namespace Prefix: | wff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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