The 13th International Symposium on Photonics and Optoelectronics (SOPO 2020) will be held from August 14 to 16, 2020 in Kunming, China. SOPO 2020 is co-organized by by Wuhan University, Beijing University of Posts and Telecommunications, IPOC State Key Lab, and other institutions. SOPO is an annual conference in China since 2009. It was held in Wuhan, Chengdu, Shanghai, Suzhou, Xi'an, Beijing, Guilin, Sanya and Kunming from 2009 to 2019. Each year there are 100 - 200 attendees from Asia, Europe, America, etc., and there have been quite a lot of well known experts giving plenary speeches. In 2020, SOPO will be held from August 14 to 16 in Kunming, China. It dedicates to facilitating the global development of Photonics and Optoelectronics and exploring ways in which the latest research results can be shared.