Shijiazhuang Yaqi Brush Product Co otherwise known as Yaqibrush is located in Heibei province, China.
They started by manufacturing and selling make-up and shaving brushes. In 2017 they started selling retail on Alibaba and also diversified away from "only" brushes and into other shaving products.
They now sell a range of shaving products, including razors, soaps and splashes. We know that the soaps and splashes are not manufactured by them and I suspect that the razors are also not.
They have a fairly extensive range of razors, which is constantly changing, but its the Adjustables that interest me.

Yaqi Version 2	Yaqi The Final Cut	Yaqi Brass Version