Wang Yongliang (C), a doctor of the Beijing Friendship Hospital, kisses his son before departure at the Beijing Capital International Airport on Aug 15, 2014. The 24th Chinese medical team from the Beijing Friendship Hospital left for the Ebola-affected Guinea for a two-year aid mission on early Saturday. Besides, three public health experts from the disease prevention and control center, Ditan Hospital and Peking Union Medical College Hospital were also on the flight.[Photo/Xinhua]