President Xi emphasized after Thursday's meeting the "traditional friendship" between the countries.
It will not change regardless of how the international situation develops, Xi says to Kim, according to the Chinese state television channel CCTV.
Kim Jong-Un said in turn that North Korea is ready to increase the exchange with China at all levels and "deepen mutually beneficial cooperation in economy and trade".
China is North Korea's most important ally on the global arena. Over the years, Beijing has provided the sanctions-hit neighboring country with diplomatic, economic and political support.
Kim arrived in Beijing on Tuesday by train together with his daughter Kim Ju-Ae, who has been pointed out as a possible successor.
