[the United States may become South Korea's largest export market]-data released by South Korea's Ministry of Industry, Trade and Resources on the 6th showed that South Korea had a trade surplus of 7.2 billion US dollars with the United States in the first quarter of this year, making the United States South Korea's largest trade surplus country. According to exports to the United States, exports of petroleum products (30.5%), petrochemical products (24.7%), iron and steel (26.6%), auto parts (16.2%), secondary batteries (50.0%) and plastic products (15.9%) all increased.