1, regional differences: in some areas, especially in the northern dialect, the word "pro" is pronounced as "pu", so the "dried fruit" is also pronounced as "guopu".

2, the evolution of language: in the process of the development of the Chinese language, the pronunciation of some words will change, in a certain period of time or in a certain region, the correct pronunciation of "fruit preserved" is "guopu", but with the passage of time and the evolution of the language, this pronunciation gradually spread. reading gradually spread.