State oil giant PetroChina plans to shut its largest Chinese refinery in 2025 after years of considering moving the processing to a smaller site, anonymous sources told Reuters on Monday. PetroChina has been thinking for years to shut its Dalian Petrochemical plant in downtown Dalian, north China. The 410,000-barrels per day refinery accounts for about 3% of the total Chinese refinery output. The municipal authorities of Dalian have been pushing for years for the relocation of the refinery away from Dalian city. The relocation and the closure of…