You have to understand, the Chinese don't have access to the entire interwebs and it shows.
No no, only one person in China knows how lasers work. His name is Colonel Neo Yttrium Orthvanadate Wing Yu Chi.dude they make all this stuff (lasers scanners etc) they should know about it!? lol
i love that hes using a microcontroller, and actually counting the RPM's of the motor, perhaps it has precise speed control? overkill but cool
You obviously not fluent in Chinglish.