A plea to send them to South Korea is rejected, according to officials.
His visit ends a nearly half-year gap in high-level talks between Pyongyang and Beijing.
An expert on North Korean nuclear issues speaks about tensions on the peninsula following Pyongyang's short-range missile tests.
Phony bills are spreading fast in areas near the border, sources say.
The firings draw international condemnation for raising regional tensions.
The firings follow bellicose threats of nuclear war on the Korean Peninsula.
Traders say business is picking up as tensions ease.
Beijing is providing fertilizer and plans to give food to the impoverished nation.
A North Korea expert speaks about the indefinite shutdown of the Kaesong industrial park.
Houses near the Chinese border give access to trade opportunities.
A family of ex-North Korean defectors in the U.S. try to help their compatriots back home.