An example of this is the "black tech facial machine":
Japan has been Chinese millennials' favorite shopping destination for beauty since 2015 and the fastest-growing category in the "J-beauty" scene are high-tech facial rollers. The Japanese brand ReFa accounted for half of the total revenue on facial rollers, and during last year's November 11 Singles Day shopping festival, Tmall sold more than $4 million (RMB 27.5 million) worth of ReFa machines in one day.