A trained rat belonging to animal trainer Guo Shutong performs at the Acrobats World in Wuqiao, Hebei Province, January 29, 2008. Guo has been training rats since 1993 and performs stunts with five rats in a "rat city" made of small wooden houses connected with ropes. China will usher in the "Year of the Rat" on February 7, according to the lunar calendar. [Agencies]