China has barred North Korean vessels from entering six of its ports under new unilateral orders given to its port authorities in March, according to an article published by the Asahi Shimbun on Tuesday.

Citing unnamed sources “close to Chinese port authorities and trading firms”, the Asahi Shimbun named the ports of Nantong, Rizhao, Penglai, Weifang, Tianjin and Yingkou as being subject to the new measures.