The reelection of Kim Jong-un is the type of election Xi likes, one with no opposition because anyone that thinks of opposing is killed:

Chinese President Xi Jinping on Monday sent a congratulatory letter to North Korean leader Kim Jong-un on his reelection as the ruling party’s general secretary, vowing to strengthen strategic cooperation with Pyongyang, a Chinese news report said.
Xi sent the celebratory telegram to Kim after the North Korean leader was reelected as general secretary of the ruling Workers’ Party of Korea during the ongoing party congress, Xinhua News Agency reported.
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