The U.S. sanctioned six individuals and five entities based in China for supporting North Korea’s weapons programs on Wednesday, revealing a network of companies that allegedly helped Pyongyang procure parts for ballistic missiles and satellites.

In a press release, the Treasury Department’s Office of Foreign Assets Control (OFAC) said the new sanctions build on its 2023 designation of Choe Chol Min, a Beijing-based representative of the DPRK’s Second Academy of Natural Sciences responsible for developing “advanced weapons systems.”

According to OFAC, Shi Qianpei was the “key facilitator for Choe Chol Min,” working with the North Korean official to