Prepayments and Other Assets, Net - Schedule of Prepayments and Other Assets, Net (Details) ¥ in Thousands, $ in Thousands	Jun. 30, 2026 CNY (¥)	Jun. 30, 2026 USD ($)	Dec. 31, 2025 CNY (¥)
Schedule of Prepayments and Other Assets, Net [Abstract]
Security deposits with real estate developers, net (Note(a))	¥ 16,433		¥ 17,801
Rental and other deposits, net (Note (b))	2,188		2,329
Other receivables, net (Note (c))	74,130		62,476
Prepayments and other assets, net	¥ 92,751	$ 13,669	¥ 82,606

Represents the amount of rental and other deposits, net, current.

No definition available.

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Namespace Prefix:	duo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the ampunt of security deposits with real estate developers, net, current.

+ References

No definition available.

+ Details

Name:	duo_SecurityDepositsWithRealEstateDevelopersNetCurrent
Namespace Prefix:	duo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant