Hu Jintao denounced during the Cultural Revolution, an event that (together with his relatively humble origins) apparently had a deep effect upon Hu, who diligently tried to clear his father's name. He joined the Communist Party of China (CPC) in April 1964 and began to work as an engineer in July 1965 after he graduated from the Water Conservancy Engineering Department at Tsinghua University, where he majored in the study of hub hydropower stations. During his time at Tsinghua, he met his wife Liu Yongqing. In 1968, Hu volunteered for his service in Gansu and worked on the construction of Liujiaxia Hydroelectric
Hu Jintao Station while also managing CPC affairs for the local branch of the Ministry of Water Resources and Electric Power. From 1969 to 1974, he worked for Sinohydro Engineering Bureau as an engineer. In 1973, Hu was transferred to the Construction Department of Gansu as a secretary. The next year he was promoted to vice senior chief. In 1980, Deng Xiaoping implemented the "Four Transformations" program, which aimed to produce communist leaders who were "more revolutionary, younger, more knowledgeable, and more specialized." In response to this nationwide search for young party members, Song Ping, the first secretary of CPC Gansu Committee