TAIWAN's Evergreen has ordered four 23,000-TEU ships built two at SSC Hudong-Zhonghua Shipbuilding and another two at CSSC Jiangnan Shipyard, both Shanghai-based, reports Colchester's SeaTrade Maritime News. The four ships, the biggest in the Evergreen fleet and among the largest in the world, are designed by Hudong-Zhonghua and incorporate environment friendly, efficiency and energy saving systems. Another six Evergreen 23,000-TEUers will be built by South Korea's Samsung Heavy Industries.