Handwriting, in a broad sense, is the use of various tools to write on a certain interface with the traces of text specification restrictions  In a narrow sense, it refers to the writing with text specification restrictions left on paper by the writer in a natural state traces
The degree of continuous strokes and stroke structure of different handwritings are different
 Because the writer's personality and psychological characteristics are different, it can be speculated that the study of human handwriting can analyze the writer's personality characteristics and psychological state