Why does the nib of Xiaomi Smart Pen 2nd generation wear out quickly when writing on paper-like film?

The hardness of the pen tip is softened for writing on the surface of the tablet screen or tempered film, the friction coefficient of the paper-like film is relatively large, and writing on the paper-like film of the Xiaomi Smart Pen will lead to rapid depletion of the pen tip, so it is recommended that you don't use the stylus on the paper-like film.