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Cover Page - shares
 12 Months Ended
Dec. 31, 2021
Feb. 28, 2022
Document Information [Line Items]    
Document Type 20-F  
Amendment Flag false  
Document Registration Statement false  
Document Annual Report true  
Document Transition Report false  
Document Shell Company Report false  
Document Period End Date Dec. 31, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus FY  
Entity Registrant Name LIZHI INC.  
Entity Central Index Key 0001783407  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Shell Company false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Interactive Data Current Yes  
Document Accounting Standard U.S. GAAP  
Entity File Number 001-39177  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One Yangcheng Creative Industry Zone  
Entity Address, Address Line Two No. 309 Middle Huangpu Avenue  
Entity Address, City or Town Guangzhou  
Entity Address, Postal Zip Code 510655  
Entity Address, Country CN  
ICFR Auditor Attestation Flag true  
Auditor Name PricewaterhouseCoopers Zhong Tian LLP  
Auditor Firm ID 1427  
Auditor Location Beijing, the People’s Republic of China  
Business Contact [Member]    
Document Information [Line Items]    
Contact Personnel Name Chengfang Lu  
Entity Address, Address Line One Yangcheng Creative Industry Zone  
Entity Address, Address Line Two No. 309 Middle Huangpu Avenue  
Entity Address, City or Town Guangzhou  
Entity Address, Postal Zip Code 510655  
Entity Address, Country CN  
Country Region 86  
City Area Code 20  
Local Phone Number 3866-4265  
Contact Personnel Email Address luchengfang@lizhi.fm  
American Depositary Shares [Member]    
Document Information [Line Items]    
Title of 12(b) Security American depositary shares, each ADS represents 20 Class A ordinary shares, par value US$0.0001 per share  
Trading Symbol LIZI  
Security Exchange Name NASDAQ  
Ordinary Shares A [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   783,141,010
Title of 12(b) Security Class A ordinary shares, par value US$0.0001 per share  
No Trading Symbol Flag true  
Security Exchange Name NASDAQ  
Ordinary Shares B [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   231,215,000