There's an excellent reason you are unlikely to have heard of the Rotai brand. Besides that, Rotai is the world's most prestigious robotic massage chair company. Most of their manufacturing output is sold under various brand names worldwide.
The Rotai Health and Technology Corporation Ltd commenced trading with five employees in 1997 (then named Rongtai). Twenty-five years later, they now employ over 2,000 staff. They are considered one of the most important manufacturers worldwide, focusing on robotic massage chairs. (databridgemarketresearch.com)
The massage chair industry's Research & Development department is recognised as "top of the tree". They own over 100 patents for robotic chair inventions, of which those patents are often licensed to other massage chair manufacturers.
Rotai were entered into the "Famous Trademarks of China" (equivalent to the Hall of Fame). They are as well known in China as, for example, Rolls Royce or Barclays are in the United Kingdom.