Cristian Palomo (R, front) and Melisa Sacchi (L, front) dance to celebrate their winning of the Floor Tango Category of the World Tango Tournament in Buenos Aires, capital of Argentina, on Aug. 30, 2016. A total of 540 couples, of whom 140 are foreigners, contended at the tournament in floor and stage tango categories. (Xinhua/Martin Zabala)