1987

▲On August 25, 1987, according to the Municipal Economic Commission, East Economic Commission longitude technological transformation word No. 40 "about District Chemical Factory (calcium base grease production improvement project proposal) replied,", approved the construction of 5000 tons / year calcium base grease production line.
On October 29, 1987, Municipal Economic Commission issued longitude technical word no. 52 "of Dongying District chemical factory's oil refining workshop project proposal approval", east longitude technological transformation word the No. 50 on the district chemical factory ground crude oil purification device project proposal approval ", east longitude technological transformation word no. 51," a district chemical factory ground crude oil purification device project proposed device project proposals, "agreed construction projects.