A senior Chinese official has held talks with the head of North Korea's parliament as the two countries mark the 50th anniversary of a treaty of friendship.
Footage from Associated Press Television News in Pyongyang showed Chinese Vice Premier Zhang Dejiang greeting Kim Yong Nam in Pyongyang on Tuesday and later touring Kim Il Sung University and its computer library.
Zhang arrived in Pyongyang on Sunday and was due to leave Wednesday.
The visit comes as China and North Korea deepen economic ties following a May trip to China by North Korean leader Kim Jong Il.
The countries fought together in the 1950-53 Korean War and China remains North Korea's most important ally.