Restricted Net Assets (Details) - Company's subsidiaries, VIEs and subsidiaries of VIEs incorporated in PRC - CNY (¥) ¥ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Restricted Net Assets
Portion of after-tax profit to be allocated to general reserve fund under PRC law (as a percent)	10.00%
Required general reserve/registered capital ratio to de-force compulsory net profit allocation to general reserve (as a percent)	50.00%
Restricted net assets	¥ 646.3	¥ 636.5
Minimum
Restricted Net Assets
Percentage of restricted net assets	25.00%

Percentage of restricted net assets of the Company’s subsidiaries, the VIEs and the subsidiaries of the VIEs.

No definition available.

Name:	feng_PercentageOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
Namespace Prefix:	feng_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum percentage of the appropriation to the statutory surplus fund over the after-tax profits calculated in accordance with PRC GAAP.

+ References

No definition available.

+ Details

Name:	feng_PortionOfAfterTaxProfitToBeAllocatedToGeneralReserveUnderPrcLaw
Namespace Prefix:	feng_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of the surplus fund over the registered capital of the respective company thus appropriation is not required.

+ References

No definition available.

+ Details

Name:	feng_RequiredGeneralReserveRegisteredCapitalRatioToDeForceCompulsoryNetProfitAllocationToGeneralReserve
Namespace Prefix:	feng_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Schedule of restricted net assets [Line Items]

+ References

No definition available.

+ Details

Name:	feng_ScheduleOfRestrictedNetAssetsLineItems
Namespace Prefix:	feng_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

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

- Details

Name:	dei_LegalEntityAxis=feng_GroupsSubsidiariesViesAndSubsidiariesOfViesIncorporatedInPrcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: