Compared word slow with fast, confirmed that it is analysable. A basic book in English is the best self promotion tool.
It may called as "二元一次方程"--Binary linear equation, Probably someone stopped at this binary for their 一元一次 thinking. I am not good in math.Although i thought about numbers often.
Understood stock charter better by multiple angle view, but it can only be proven if I can made $300+ latter.
It gave me a new light and alarm to finish my preparation to be Liu Xiandi :).
