Although everyone will receive the same guidance and training when learning calligraphy, everyone's hand muscle tissue, finger length and grip strength are different. These individual differences will directly affect the shape and line characteristics of fonts, resulting in different handwriting styles for everyone.
In addition, individual differences will not only affect the shape of handwriting, but also affect the writing speed and accuracy.
Some medical research shows that people who often use electronic products are less active in font processing, have more even fonts, and lack personalization and expressiveness when writing. So some people's handwriting looks rigid and lacks personality, and it is difficult to distinguish different handwriting.
Even if everyone's handwriting is not exactly the same, you can still tell who owns it from its line characteristics and style.