BEIJING (AFX-ASIA) – Liaohe Jinma Oilfield Co Ltd (SZA 000817) said its 2003 net profit increased 35.25% to 538.11 million yuan for 2003 due to higher crude oil prices. The company, which extracts oil in northeast China, said core revenue increased 15.01% to 1.39 billion yuan with a gross profit margin of 63.57%, up 10.51…