An Aldabra tortoise rests under light heater in the zoo of Beijing, capital of China, Jan. 23, 2016. The highest temperature in Beijing dropped to minus 10 degrees Celsius on Friday and will hit a 30-year low record of minus 17 degrees Celsius from Saturday through Sunday, the Beijing meteorological station said. The zoo protected its animals from the cold wave in various ways. (Xinhua/Chen Yehua)