International Conference on Display Technology ( ICDT ) is the only display technology conference held solely by SID outside the United States. Following the successful holding of the first ICDT in Fuzhou in 2017, the second ICDT 2018 with higher standard and a larger scale was successfully held in Guangzhou Luogang Convention Center in April 2018. It attracted more than 40 academicians and SID fellow from home and abroad, more than 50 national distinguished experts, national outstanding scholars, and more than 1000 people from universities, institutions and display related companies around the world, among whom nearly 150 were overseas participants. ICDT 2019 saw the total number of attendees was over 1000 too, and nearly 200 people from overseas. In the post-COVID-19 era, the fourth ICDT with great influence and critical acclaim was held in China Optics Valley Convention & Exhibition Center in Wuhan from October 11 to 14, 2020. More than 800 people attended on-site, and more than 1,000 people attended online. ICDT has become an influential annual international display technology event. The fifth International Conference on Display Technology (ICDT) 2021 will be held on June 6-9, 2021 in Beijing, China.