  Front-following is more technically difficult to implement than the other two
human following technologies, but front-following technology is more practical
and can be applied in more areas to solve more practical problems.
Front-following technology has many advantages not found in back-following and
side-by-side technologies. In this paper, we will discuss basic and significant
principles and general design idea of this technology. Besides, various of
novel and special useful methods will be presented and provided. We use enough
beautiful figures to display our novel design idea. Our research result is open
source in 2018, and this paper is just to expand the research result
propagation granularity. Abundant magic design idea are included in this paper,
more idea and analyzing can sear and see other paper naming with a start of
Robot Design System with Jinwei Lin, the only author of this series papers.
