The U.S. Department of the Treasury on Tuesday issued new sanctions targeting North Korea’s foreign trading partners in China, the North’s shipping industry and a company involved in facilitating DPRK laborers overseas.

Treasury’s Office of Foreign Assets Control (OFAC) added one individual, 13 companies, and 20 vessels to its list of designations under Executive Orders 13810 and 13722 – which target the North’s transport sector and its exportation of foreign workers.

“These designations include companies that have engaged in trade with North Korea cumulatively worth hundreds of millions of dollars,” Treasury Secretary Steven T. Mnuchin said in a press release accompanying the designations.