Dear Editor,African swine fever (ASF) is a highly contagious disease of domestic pigs caused by African swine fever virus (ASFV),with mortality rates approaching 90％-100％.The first ASF case was described in 1921 in Kenya.Over the past decades, ASF has spread from Sub-Saharan Africa to Europe and Asia, and pose a huge threat to global food safety.Since the first ASF case reported in August 2018, more than 10 million pigs had been culled in China at an enormous economic loss.The risk of ASFV mutating to infect humans is extremely low.However, ASF not only threatens food security but also severely strikes the world economy in many fields, such as the global supply of the blood thinner heparin,most of which is produced from pigs.Hence, ASF is a strictly monitored infectious animal disease by OIE (World Organization for Animal Health), unfortunately, there is no approved drug or vaccine against this lethal viral disease.