Gu Quanping and wife Lv Aiping join other tourists to sing in Australia, Dec. 24, 2015. Gu, who is in his seventies, was diagnosed with advanced gastric cancer in 2013 and later recovered after surgery. Gu and Lv visited Australia last November at the invitation of their son Gu Gu, a photographer, to mark the couple's 50th wedding anniversary. (Photo/Xinhua)
