SINGAPORE - China’s Yangzijiang Shipbuilding Holdings Ltd reported late Tuesday that its second-quarter net profit fell 17 percent on a year earlier even as revenue jumped, due to the construction of vessels with lower profit margins. Yangzijiang, the most profitable listed yard in China, posted a net income for the quarter ended June 30 of 1.03 billion yuan ($165.9 million). Revenue of 5.7 billion yuan was up 34 percent from a year earlier. ($1 = 6.2086 Chinese yuan)