China's sanctions on U.S.-linked units of shipbuilder Hanwha Ocean threaten to impact ambitious plans for shipbuilding cooperation between Seoul and Washington by disrupting supplies of Chinese equipment and materials, officials in Seoul said on Friday.Beijing announced the sanctions on Tuesday as the U.S. and China began charging additional port fees on each other's vessels, in the latest exchange in a protracted trade war ahead of a planned meeting of the two countries' leaders…
