The OCPA conference is a conference for Chinese Physicists and Astronomers worldwide. Since 1994, the conference has been held regularly every two (or three) years. Past conferences were held in Shantou (1994), Taipei (1997), Hong Kong (2000), Shanghai (2004), Taipei (2006), Lanzhou (2009), Kaohsiung (2011) and Singapore (2014). The scientific program features plenary sessions, followed by invited and contributed talks in parallel sessions. Scientific topics cover the latest experimental and theoretical developments in all subareas of physics. The educational program covers new progress in physics education, public outreach, mentoring of undergraduate students, graduate students and postdoctoral fellows.