SOPO, the 9th International symposium on photonics and optoelectronics, is an annual conference in China since 2009. It was held in Wuhan, Chengdu, Xi'an, Shanghai and Beijing from 2009 to 2015. In 2016, SOPO will be held from August 26 to 28, 2016 in Xi'an, China. This Conference will cover issues on Photonics and Optoelectronics. You are invited to submit papers in all areas of Photonics and Optoelectronics.