People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the Sunan International Airport in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Pang Xinglei)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the square of the Kumsusan Palace of the Sun in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Huang Jingwen)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the square of the Kumsusan Palace of the Sun in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Huang Jingwen)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the square of the Kumsusan Palace of the Sun in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Huang Jingwen)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the square of the Kumsusan Palace of the Sun in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Shen Hong)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the Sunan International Airport in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Pang Xinglei)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the square of the Kumsusan Palace of the Sun in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Shen Hong)

A military band prepares to welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the square of the Kumsusan Palace of the Sun in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Shen Hong)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping on the street in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Jiang Yaping)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping on the street in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Jiang Yaping)

People welcome General Secretary of the Central Committee of the Communist Party of China and Chinese President Xi Jinping at the Sunan International Airport in Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), June 20, 2019. Xi arrived here Thursday for a state visit to the DPRK. (Xinhua/Pang Xinglei)