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During his visit on Monday and Tuesday, Kim told Xi he hoped relevant parties would take "phased" and "synchronised" measures to realise denuclearisation and lasting peace on the Korean peninsula.
Xi hosted a banquet and told Kim of his support for North Korea's strategic shift towards economic development, Xinhua added.
The visit, part of a flurry of diplomatic engagement that has dramatically eased tension on the Korean peninsula, follows Kim's recent historic summit with South Korean counterpart Moon Jae-in, and precedes a planned meet with US President Donald Trump.
It also followed Kim's dramatic train journey to Beijing in March, his fist known trip abroad since assuming power in 2011.