1991
鈻睮n September 17, 1991, was set for the Shandong province (a) type enterprises.
鈻睸eptember 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.
鈻睯uly 14, 1991, calcium base grease started production.