Chempricehub, June 30 - On June 26, the 100,000-ton/year refined wet-process phosphoric acid project invested and constructed by Yunfu Mining, a subsidiary of Yuegui Co., Ltd., officially entered the trial production stage. This project is a key project at both the provincial (Guangdong) and municipal (Yunfu) levels, and it is also the largest-scale physical industrial project since the establishment of the Yunfu pyrite mine.