O le Drone World Congress 2019 ma le 4th Shenzhen International UAV Expo na tatalaina i le Aso Tofi i Guangdong - o se gataifale itumalo o sautesasaʻe o Saina, e tuaoi Hong Kong ma Macau.
Sili atu 400 Saina ma faava o malo pisinisi o loʻo auai i le faʻaaliga.
Sili atu i le 1,000 drones faʻamoemoe e faʻaalia i le mea na tupu.