Illegal. According to WeChat official website, it is illegal to sell drugs in WeChat business. The Measures for the Supervision and Administration of Drug Online Sales issued by China's Drug Administration severely cracked down on the sale of drugs on WeChat, which stated that the display and sale of prescription drugs must be prohibited and there was no room for discussion. For units and departments that sell drugs online, only drugs approved by the Food and Drug Administration can be purchased online, and units and departments that sell drugs must have a Drug Business License.