Kim Jong-un Visits China Again

North Korean leader Kim Jong-un arrived in Beijing on Tuesday morning for a four-day visit at the invitation of Chinese President Xi Jinping, the Chinese government has confirmed.

A train presumably carrying Kim was spotted late Monday night in the Chinese border city of Dandong, where security was suddenly tightened.

Kim is expected to meet with Xi just as North Korea and the U.S. try to pinpoint a location for their next summit.

Kim also traveled by train to Beijing when he visited China for the first time last March. He has since met Xi in China two more times, in May and June before and after his historic summit with U.S. President Donald Trump.

There is speculation that he is seeking advice from Xi as he prepares for further denuclearization talks with Trump.

In his New Year's address, Kim Jong-un warned that North Korea may choose a "different path" if the U.S. continues with sanctions and pressure.