FILE PHOTO - A vendor receives Chinese banknotes after selling North Korean goods to tourists on a boat taking them from the Chinese side of the Yalu river for sightseeing to the shores of North Korea

FILE PHOTO – A vendor receives Chinese banknotes after selling North Korean goods to tourists on a boat taking them from the Chinese side of the Yalu river for sightseeing to the shores of North Korea

A vendor receives Chinese banknotes after selling North Korean goods to tourists on a boat taking them from the Chinese side of the Yalu river for sightseeing close to the shores of North Korea near Dandong in China's Liaoning Province on April 1, 2017. REUTERS/Damir Sagolj

July 14, 2017 9:57 AM (UTC+8)