I don't see any mention of Mao's phrase to describe the relationship between China and North Korea as "close as lips and teeth." I'm guessing the lips got tired of being bitten.

Both China and North Korea confirmed that Kim Jung Un traveled to Beijing earlier this week for meetings with Xi Jinping. The White House even released a statement that Xi had sent a message to President

A train that may have carried North Korean dictator Kim Jung Un was spotted in Beijing on Monday. It returned to North Korea on Tuesday. If Kim was on board the train, it was the first visit by North Korea's