Animal trainer Guo Shutong demonstrates the skills of his trained rats during a performance 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)