A post office staff member sells stamps marking the election of Antonio Guterres as the secretary general of the United Nations in lisbon, Portugal, on Jan. 1, 2017. Correios de Portugal (CTT), the national postal service, issued on Wednesday the first day cover and two stamps with the face value of 0.8 euros and 2 euros marking the election of Antonio Guterres as the secretary general of the United Nations. (Xinhua/Zhang Liyun)
