In April 1980, at the Long-term Planning Meeting of the Central Committee of CPC, Deng Xiaoping argued: "In underdeveloped and impoverished regions such as Northwestern China, Guizhou, and Yunnan province, approaches such as household responsibility system should be adopted".[2] During another speech in May, Deng Xiaoping supported the practice of Fengyang County and Feixi County of Anhui province and said that "[s]ome colleagues worried that to practice this kind of system might hamper the development of the collective economy.