It is difficult to preserve papyrus and its structure is fragile. The papyrus from the 1950s has collection value, but having beautiful calligraphy on it will greatly increase the collection value. Straw paper refers to paper made from straw, reeds, weeds and other plant straws. It looks rough and a little yellow. This kind of straw paper was used by students in the 1970s and 1980s to make drafts or practice calligraphy. Its price is relatively cheap and saves money.