YONGIN, South Korea- A birthday party was thrown Tuesday for twin pandas at an amusement park in Yongin, just south of Seoul, with the South Korea-born animals set to return to China in the near future.Zookeepers and around 30 fans gathered to mark the third birthday of Rui Bao and Hui Bao, who are scheduled to return to China later in the year.China has ownership of all pandas, including those born outside of China, and sends them to other countries only on a lease basis. Pandas, which are an endangered species, must return to their home country before turning four, when their reproductive…READ FULL ARTICLE