During the ASIATOX-XIII (2018) in Thailand, the Asian Society of Toxicology (ASIATOX) Council has resulted that the Chinese Society of Toxicology (CST) will be the host Society of the 9th International Congress of Asian Society of Toxicology (ASIATOX-IX). Followed the Council resolution, the CST has proposed the 9th International Congress of Asian Society of Toxicology (ASIATOX-IX) will be held September 23-26, 2020 in Hangzhou, China. The congress theme is “The Asia Toxicology in Big Data Era: from Public Health to Environmental Safety”. The ASIATOX-IX will bring the member societies together, two years after the successful ASIATOX-VIII (2018) in Thailand, of the toxicology experts, professionals and students from Asia area as well as other parts of the world. As an important academic event and professional conference in toxicology and related fields, ASIATOX-IX will provide an excellent platform to promote the prosperity of toxicology and the development of toxicology science & technology in Asia, and foster the scientific cooperation in Asia, pacific region and the world. The congress academic activities of ASIATOX-IX will cover the latest research progress, frontier theory and technology, and future scientific development prospective in various aspects of toxicology, as well as the practical application of toxicological knowledge and technology in the fields of environmental and ecological safety, human health. You are warmly welcome to attend the ASIATOX-IX, and we look forward to seeing all of you in 2020 in Hangzhou, the best season and beautiful city in China.