A high-ranking North Korean figure appears to be visiting China by train, sources close to the matter said Monday, but it has yet to be confirmed whether it is the country's leader Kim Jong Un.The tight security in the Chinese border city of Dandong has prompted speculation that an important foreign dignitary is now or has already been in China, the sources said.Hotels around the Sino-Korean Friendship Bridge linking Dandong with the North Korean town of Sinuiju have not allowed their guests to enter rooms facing the river on Monday afternoon, in an apparent move to prevent the train from b…READ FULL ARTICLE