Photos were taken during the Trace Analysis and Biosensor International Symposium I under the theme “Emerging Challenges and Opportunities” at room LRC1, 8th floor, Learning Resource Center Building, Prince of Songkla University. The conference was held for 2 days, from 10 to 11 February 2020, with attendees coming from domestic and international counties. There were many activities in this symposium, including oral presentation from invited speakers, poster presentation from researchers and students, and workshop in the topic “The Demonstration of electrochemical biosensor-quality control principle and electrochemical on biosensor”. The topics of the meeting were related to technologies in trace analysis, sample preparation techniques, chromatography, optical sensors, biosensors, and electrochemical sensors. The opening ceremony presided by Professor Dr. Theerapol Srichana, Director of Research and Development, Prince of Songkha University.