MSC Irina, the world's largest container vessel, docks at Ningbo Zhoushan Port in Zhejiang province on April 2. JIANG XIAODONG/FOR CHINA DAILY China's foreign trade, underpinned by an improved overseas appetite, an optimized trading structure increasingly driven by high-tech and green products, and more diversified export destinations, will continue to show resilience in the second half of the year, officials …