Chinese Prime Minister Wen Jiabao will visit South Korea, Japan, Mongolia and Myanmar on a four-nation Asian trip starting later this month. <br/><br/>The spokesman of the foreign ministry said that Wen will attend a three-nation summit with South Korean President Lee Myung-Bak and Japanese Prime Minister Yukio Hatoyama on the island of Jeju in South Korea. <br/><br/>The summit on May 29 and 30 will likely focus on the North Korean nuclear issue, including the alleged torpedoing of a South Korean naval vessel by a North Korean submarine that killed 46 sailors.