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Customers' refundable fees (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement In Customers Refundable Fees
Balance at the beginning of the year	¥ 30,997	¥ 36,074	¥ 44,916
Cash received from customers	42,298	43,527	55,403
Cash refunded to customers	(46,554)	(35,374)	(26,329)
Revenue (recognized) reversed	4,006	(13,230)	(37,916)
Balance at the end of the year	¥ 30,747	¥ 30,997	¥ 36,074

X

- Definition

Amount of cash inflow from customers for revenue related transactions that are refundable to the customers and do not meet the criteria for revenue recognition.

+ References

No definition available.

+ Details

Name:	duo_ContractWithCustomerLiabilityAdditions
Namespace Prefix:	duo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of cash outflow to customers for refund payments.

+ References

No definition available.

+ Details

Name:	duo_ContractWithCustomerLiabilityReversal
Namespace Prefix:	duo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

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Namespace Prefix:	duo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total revenue recognized from both the beginning balance and current period increase in contract liability.

+ References

No definition available.

+ Details

Name:	duo_TotalRevenueRecognizedFromBothBeginningBalanceAndCurrentPeriodIncreaseInContractLiability
Namespace Prefix:	duo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044

+ Details

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