v3.25.2
Cover
Aug. 06, 2025
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 06, 2025
Entity File Number 001-42700
Entity Registrant Name BEST SPAC I Acquisition Corp.
Entity Central Index Key 0002051587
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code D8
Entity Address, Address Line One 701, 7/Floor
Entity Address, Address Line Two United Building
Entity Address, Address Line Three 17-19 Jubilee Street
Entity Address, City or Town HK
Entity Address, Country HK
Entity Address, Postal Zip Code 00000
City Area Code +852
Local Phone Number 9828 3397
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share, with no par value, and one right to receive one-tenth of one Class A ordinary share  
Title of 12(b) Security Units, each consisting of one Class A ordinary share, with no par value, and one right to receive one-tenth of one Class A ordinary share
Trading Symbol BSAAU
Security Exchange Name NASDAQ
Class A ordinary shares, with no par value  
Title of 12(b) Security Class A ordinary shares, with no par value
Trading Symbol BSAA
Security Exchange Name NASDAQ
Rights [Member]  
Title of 12(b) Security Rights
Trading Symbol BSAAR
Security Exchange Name NASDAQ