yalu river

A North Korean soldier looks through binoculars along the banks of the Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong...A North Korean soldier looks through binoculars along the banks of the Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, September 8, 2014.

Jacky Chen/Reuters

A North Korean soldier looks through binoculars along the banks of the Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong

A female North Korean soldier uses her mobile phone next to a sentry on the banks of the Yalu River, near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong.

Jacky Chen/Reuters

A soldier uses her mobile phone next to a sentry box on the banks of the Yalu River, near the town of Sinuiju, North Korea, opposite the Chinese border city of Dandong

A North Korean soldier stands guard along the bank of Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong...A North Korean soldier stands guard along the bank of Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, May 1, 2014. Picture taken May 1, 2014. REUTERS/Jacky Chen (NORTH KOREA -

Jacky Chen/Reuters

A soldier stands guard along the bank of Yalu River near the North Korean town of Sinuiju, which neighbours the Chinese border city of Dandong Read more

.A North Korean worker checks his mobile phone as a soldier stands in front along the banks of Yalu River, near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, June 7, 2013. China told a North Korean delegation that visited Beijing late last month that North Korea should stop conducting nuclear tests and focus on economic development, a source with knowledge of the talks told Reuters.

Jacky Chen/Reuters

A North Korean worker checks his mobile phone as a soldier stands in front along the banks of Yalu River, near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong on Friday. China told a North Korean delegation that visited Beijing late last month that North Korea should stop conducting nuclear tests and focus on economic development, a source with knowledge of the talks told Reuters.