North Korean leader Kim Jong Un visited the Chinese border city of Dandong on Saturday, according to China’s Xinhua state news agency, where he toured an anti-U.S. museum and a car factory.

Xinhua reported that “China’s top political advisor Wang Huning on Saturday accompanied” Kim during the visit and that he conveyed greetings from Chinese leader Xi Jinping. It suggested Kim returned to North Korea on the same day.

Wang and Kim, along with foreign minister Wang Yi, first visited the Memorial Hall of the War to Resist U.S. Aggression and Aid Korea, Xinhua said.

The visit coincides with the