U.S. President Donald Trump ordered new sanctions on Thursday, September 21, that open the door wider to blacklisting people and entities doing business with North Korea, including its shipping and trade networks, further tightening the screws on Pyongyang’s nuclear and missile program.

Trump stopped short of going after North Korea’s biggest trading partner, China, and praised its central bank for ordering Chinese banks to stop doing business with North Korea.

Pyongyang has resisted international pressure, conducting its sixth and largest nuclear test on Sept. 3, and launching numerous missiles this year, including two intercontinental ballistic missiles and two other rockets that flew over Japan.