https://sputniknews.com/asia/201711021058754615-jinping-rare-message-to-kim-jong-un/

This is What Xi Jinping Told 'Comrade Chairman' Kim Jong-un in Rare Message

In a rare message sent “out of politeness” Chinese President Xi Jinping has publicly communicated with North Korean leader Kim Jong-un after more than a year.

The note was sent in response to congratulations from Kim Jong-un last week for securing a second term as the head of China's ruling party.

"I wish that under the new situation the Chinese side will make efforts with the DPRK  to promote relations between the two parties and the two countries to a sustainable soundness and stable development," Xi said, according to North Korea’s KCNA news agency, addressing Kim as "Comrade Chairman.”