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North Korean leader Kim Jong-un visited China on Saturday, arriving in the border city of Dandong via a newly opened bridge linking the two nations, according to a government source cited by Yonhap News Agency. The trip, made days before the anniversary of Chinese troops entering the 1950-53 Korean War, was aimed at reaffirming historic 'blood ties' between the countries, the Korea Times reports. Kim met with Beijing's top political adviser and said he hoped to expand cooperation with China. An editorial in the Korea Times urges that the visit 'must lead to restraint,' noting the peninsula's future cannot be understood through inter-Korean relations alone.