Does Gansu Agricultural University need to recycle its diploma?

Yes, take it back.

Gansu Agricultural University, located in Lanzhou City, Gansu Province, is a university jointly established by the Ministry of Agriculture and the Gansu Provincial People's Government, a high-level university in Gansu Province, and one of the 100 central and western universities under state key construction. It was selected into the basic capacity building project of universities in the central and western regions, the education and training plan of outstanding agricultural and forestry talents, the national postgraduate project of building a high-level university, and the national key discipline project.