This year's G20 Leaders' Summit will take place on November 30 and December 1 in the capital of Argentina, marking the first time the event is held in South America. How is Buenos Aires preparing for such a big event? What role will China play in this year's summit? Will G20 members reach consensus on global economy and free trade? CGTN is launching a special series "Hola Argentina!" with Vlogs and livestreams from Buenos Aires covering in depth the preparations for and proceedings of the G20 Summit.