China has sounded out Japan and South Korea to hold a trilateral summit again in December in Beijing, hoping to further ramp up cooperation to denuclearize North Korea, diplomatic sources said Sunday.With the leaders of Japan, China and South Korea having met for a summit in Tokyo just last month, it is unusual for a trilateral meeting at this level to be held again in the same year.China, a key economic benefactor of North Korea, appears to be pushing for a successive summit with its neighbors to ensure that it has the lead in the North Korean nuclear issue, following the recent historic U…READ FULL ARTICLE