1991

▲In September 17, 1991, was set for the Shandong province (a) type enterprises.

▲September 17, 1991, the provincial Economic Commission issued by the word "585th" in the word "on the announcement of the second batch of Shandong Province, the list of medium-sized industrial enterprises notice", was identified as the Shandong province (a) type enterprises.

▲July 14, 1991, calcium base grease started production.