BEIJING: China’s shipbuilding businesses posted significant increases in combined profits and revenue last year with improving global competitiveness. The major shipbuilders profits surged 131.7 percent year on year to 25.9 billion yuan (3.64 billion U.S. dollars) and their main business revenue stood at 623.7 billion yuan, up 20 percent, data from the China Association of the National Shipbuilding Industry showed. …