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Cover
 12 Months Ended
Mar. 31, 2024
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Financial Statement Error Correction [Flag] false
Document Shell Company Report false
Entity Interactive Data Current Yes
Document Accounting Standard U.S. GAAP
ICFR Auditor Attestation Flag false
Amendment Flag false
Document Period End Date Mar. 31, 2024
Document Fiscal Year Focus 2024
Document Fiscal Period Focus FY
Entity Information [Line Items]  
Entity Registrant Name UTime Limited
Entity Central Index Key 0001789299
Entity File Number 001-40306
Entity Incorporation, State or Country Code E9
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Shell Company false
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 7th Floor
Entity Address, Address Line Two Building 5A
Entity Address, Address Line Three Shenzhen Software Industry Base
Entity Address, City or Town Nanshan District
Entity Address, Country CN
Entity Address, Postal Zip Code 518061
Entity Listings [Line Items]  
Title of 12(b) Security Ordinary shares, par value US$ $0.0001 per share
Trading Symbol WTO
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding 392,113,953
Business Contact [Member]  
Entity Contact Personnel [Line Items]  
Contact Personnel Name Hengcong Qiu
Entity Address, Address Line One 7th Floor
Entity Address, Address Line Two Building 5A
Entity Address, Address Line Three Shenzhen Software Industry Base
Entity Address, City or Town Nanshan District
Entity Address, Country CN
Entity Address, Postal Zip Code 518061
Entity Phone Fax Numbers [Line Items]  
City Area Code (86)
Local Phone Number 755 86512266