After 1949, Kunming developed rapidly into an industrial metropolis with the construction of large iron and steel and chemical complexes, along with Chongqing, Chengdu and Guiyang in the southwest. A Minorities' Institute was set up in the 1950s to promote mutual understanding and access to university education among Yunnan's multiethnic population. The city consolidated its position as a supply depot during the Vietnam War and subsequent border clashes. Until Mao Zedong's death, Kunming was still generally thought in much of the rest of the country as a remote frontier settlement and so it acted as a place up to then for the government to exile people who had fallen politically out of favor, especially during the Cultural Revolution.