The story
1987: It was founded by Mr. Zhang En-rong in a name of Shouguang Petroleum Machinery Accessories Company Limited.
1989: Its name changed to Shouguang Petroleum Machinery Company Limited.
1994: Shandong Molong Petroleum Machinery Company Limited was established.
2006: It was listed on the Growth Enterprise Market of the Hong Kong Stock Exchange (SEHK: 8261).
2007: It was listed on the Main Board of the Hong Kong Stock Exchange. (SEHK: 568)
From Wikipedia’s article on Shandong Molong Petroleum Machinery, shared under CC BY-SA 4.0.4