New irregularities can be seen in China’s trade with North Korea, even on items not related to the recent United Nations Security Counsel resolution, sources told NK News.

Importing rice from China to North Korea requires more paperwork than before, and construction material trade is becoming more cautious, the sources said. Rice and construction materials are not blacklisted under any sanctions, including the U.S. and South Korea’s unilateral sanctions that are stronger than the UN’s.