China has been buying lots of oil from Iran in violation of sanctions

…From 2020 to 2021—when the Biden administration began negotiations with Iran surrounding a revamped nuclear deal and began to unwind sanctions on the hardline regime—Iranian oil exports increased by 123 million barrels, or 40 percent, according to United Against Nuclear Iran (UANI), which closely tracks Tehran’s armada of illegal oil tankers. China was by far the top importer, signaling a growing alliance between the two rogue regimes. Beijing took in a total of 310 million barrels of crude oil and gas condensates from January to September of last year, according to UANI.