In 1986, the State Language Commission issued a list of 2,235 simplified Chinese characters as a way to standardize the written form of the language.

PianHai is an ancient Chinese dictionary contain the most amount of Chinese characters, and it is also the first large dictionary that arranged by the number of their's strokes.

This method build a dictionary library that take the strokes and stroke segment as the index parameters by making use of the stroke segment and chain code character;