Our reporter Zhao Yunfei has more about Kim's previous two visits to Beijing and China's role in building peace.  

ZHAO YUNFEI BEIJING "If you look at the timing of Kim's visit, the first was an icebreaker. The second came after the historic meeting with South Korean President Moon Jae-in at the border village of Panmunjom. And this visit, which is the third, comes after Kim met US President Donald Trump in Singapore. The frequency of his visits has not only showed Pyongyang's commitment to denuclearization, but also indicates that China is playing a key role in promoting regional peace and stability. China has taken some de facto actions to support a political solution to the Korean Peninsula crisis. For example, at the request of the DPRK, a Chinese airline provided relevant services for its delegation's trip to Singapore. Just as the Chinese Foreign Ministry earlier said, the country is willing to accommodate Pyongyang's reasonable security concerns."