Not more than 30%. According to the query of official website of Chongqing University, Chongqing University's papers are required to be in WORD file format in 2003, and the duplicate checking rate is not more than 30%. Chongqing University, referred to as Zhong Da for short, is located in Zheng Sha Street, Shapingba District, Chongqing. It is a full-time college sponsored by the state and headed by the education administrative department of the State Council.