Ban Ki Moon (C), former Secretary-General of the United Nations, receives a warm reception after arriving at the Incheon International Airport in Incheon, South Korea, Jan 12, 2017. Former UN Secretary-General Ban Ki-moon on Thursday tried hard to show his people-friendly identity as he returned to his home country, South Korea, following the end of his 10-year tenure in the top UN post. [Photo/Xinhua]