BEIJING (Reuters) -China's shipbuilders on Saturday blasted as "short-sighted" U.S. port fees announced by President Donald Trump's administration on China-linked ships, a measure aimed at the nation's shipbuilding industry. Trump signed an order on Wednesday aimed at reviving U.S. shipbuilding and reducing China's grip on the global shipping industry. The spat over ocean shipping, which conveys 80% of global trade, is the latest conflict in an intensifying trade war between China and the U.S. that has pushed levies on each other's imports beyond 100%.