N. Korea heir formally invited to China

SEOUL - China has formally invited North Korea's leader-in-waiting to visit, but it was not clear when Kim Jong-un would make the trip, a South Korean lawmaker said on Saturday, quoting a senior spy agency official.
Jong-un is North Korean leader Kim Jong-il's youngest son and heir apparent, who came into the public eye in September when he was named to a senior ruling party post and promoted to the rank of four-star general.