1, check the location and form of the signature first. Wang's signature is usually written in the lower right corner or lower left corner of the stamp with a black or red pen or brush, and sometimes the year is added.

2. Secondly, compare the font and strokes of the signature. Wang's signature has a round font and powerful strokes, and some words have special deformations, such as the top of the word "tiger" and the right of the word "Ming".

3. Finally, verify the authenticity of the signature. The authenticity of the signature can be confirmed by a professional appraisal institution or Wang himself, and can also be compared with other known real signatures.