US Sanctions 13 Chinese, North Korean Organizations

The sanctions included blacklisting three Chinese companies, Dandong Kehua Economy & Trade Co., Dandong Xianghe Trading Co., and Dandong Hongda Trade Co., which the Treasury Department said have done more than $750 million in combined trade with North Korea.

The sanctions also blacklisted Sun Sidong and his company Dandong Dongyuan Industrial Co. In a June report, Washington think tank C4ADS said Sun Sidong's firm was part of an interconnected network of Chinese companies that account for the vast proportion of trade with North Korea.

US authorities have repeatedly targeted companies and individuals from the Chinese city of Dandong, which borders North Korea, for alleged business ties to North Korea.

The new sanctions also hit several North Korean companies that send workers to countries such as Russia, Poland, Cambodia and China. United States authorities said they are seeking to cut off the money North Korea makes from the export of labor.