He called for the end of bureaucracy, centralization of power as well as patriarchy; at the same time, he proposed term limits to the leading positions in China, and advocated the "democratic centralism" as well as the "collective leadership". In addition, Deng proposed to the National People's Congress a systematic revision of China's constitution (the 1978 Constitution), and emphasized that the Constitution must be able to protect the civil rights of Chinese citizens and must reflect the principle of separation of powers; he also described the idea of "collective leadership", advocating "one man, one vote" among the leaders to avoid the dictatorship of the General Secretary of CPC. In December 1982, the fourth Constitution of China, known as the "1982 Constitution", was passed by the 5th National People's Congress, embodying Chinese-style constitutionalism with most of its content still being effective as of today. In the first half of 1986, Deng repeatedly called for the revival of political reforms, as further economic reforms were hindered by the original political system while the country had seen an increasing trend of corruption and economic inequality aggravated by social privileges of the government officials and their relatives. A five-man research unit for China's political reforms was established in September 1986; the members included Zhao Ziyang, Hu Qili, Tian Jiyun, Bo Yibo and Peng Chong. Deng's intention of political reforms was to boost the administrative efficiency, further separate the responsibilities between the Communist Party and the Government, and eliminate bureaucracy. Although he also mentioned the rule of law and democracy, Deng delimited the reforms within the one-party system and opposed the implementation of Western-style constitutionalism. In October 1987, at the 13th National Congress of CPC chaired by Deng, Zhao Ziyang gave a report drafted by Bao Tong on the political reforms. In his speech titled "Advance Along the Road of Socialism with Chinese characteristics (沿着有中国特色的社会主义道路前进)", Zhao argued that the socialism in China was still in its primary stage and, taking Deng's speech in 1980 as guidelines, outlined many detailed steps to be taken for the political reforms, including promoting the rule of law and the separation of powers, imposing de-centralization, as well as improving the election system. At this Congress, Zhao was elected as the General Secretary of CPC. However, after the 1989 Tiananmen Square protests, many leading reformists including Zhao and Bao were removed from their posts, and the majority of the planned political reforms ended drastically.