North Korean leader Kim Jong Un meets with Chinese leader Xi Jinping

In this photo provided by the North Korean government, from second left in front, Russian President Vladimir Putin, Chinese President Xi Jinping and North Korean leader Kim Jong Un arrive for a reception marking the 80th anniversary of the end of World War II, at the Great Hall of the People in Beijing Wednesday, Sept. 3.

Experts say Kim likely hopes to restore ties with China, North Korea's biggest trading partner and aid provider, as there have been questions about the bilateral relationship.

(Image credit: Korean Central News Agency/Korea News Service via AP)