2018 PDAC Int'l Convention held in Toronto, Canada

A visitor walks past a robot during the 2018 Prospectors and Developers Association of Canada(PDAC) International Convention in Toronto, March 4, 2018. As one of the biggest conventions of its kind in the world, the four-day annual event kicked off on Sunday to bring together the industry from around the world. (Xinhua/Zou Zheng)