http://laifentech.com/blogs/toothbrush/

Laifen
Back in 2019, Laifen was founded by Hongxin Ye, a visionary creative geek, who
wanted to create something truly special. Laifen independently designed and
manufactured a high-speed brushless motor capable of an astonishing 110,000
rpm. This breakthrough innovation powered the Laifen LF01, the company’s very
first fast-dry hairdryer, in 2020.
electric toothbrush