Shanghai International Port , the operator of the world's busiest container port, reported earnings on Wednesday that showed its second-quarter net profit fell 2.5 percent in a sign of slowing trade in China. Shanghai Port said in a Chinese-language filing on the Shanghai stock exchange that net profit for the first half was 2.93 billion yuan ($477 million). That was up from 2.55 billion yuan for January-June a year earlier. But second-quarter net profit totalled 1.49 billion yuan, down from 1.53 billion yuan a year ago, according to Reuters' calculations based on company data. That showed a sharp slowdown from the first quarter's 41 percent rise, though it was better than the 10.5 percent fall seen in fourth-quarter 2013, based on Reuters data.