Prolight + Sound Guangzhou 2019 concludes with record high participant figures News by Thomas Richard - April 28, 2019 As the curtain fell on Prolight + Sound Guangzhou 2019 (PLSG), show organisers announced a new record of 1,353 exhibitors who flocked to the annual event from 25 countries and regions, along with 81,154 professional visitors (7% up) from the entire professional lighting, audio, event management, stage design, system integration