In March 12th, Guangzhou Wondfo Biotech Co.Ltd(300482) issued a statement saying that the New Coronavirus (2019-nCoV) antigen test kit (colloidal gold method) developed by Guangzhou Wondfo Biotech Co.Ltd(300482) has changed the approval documents of medical devices recently. It is found that some individuals and companies have not been authorized by Guangzhou Wondfo Biotech Co.Ltd(300482) to sell illegally through the electricity supplier and other online channels. The company reserves the right to report the case to the relevant public security department and investigate the corresponding legal responsibility. According to the introduction, the product can not be used alone for the diagnosis of New Coronavirus infection. It should be combined with nucleic acid detection, imaging and other diagnostic information, medical history and contact history to determine the infection status.