Mao wanted to use Deng as a counterweight to the military faction in government to suppress any remaining influence of those formerly loyal to Lin Biao. In addition, Mao had also lost confidence in the ability of the Gang of Four to manage the economy and saw Deng as a competent and effective leader. Leaving the country in grinding poverty would do no favours to the positive legacy of the Cultural Revolution, which Mao worked hard to protect. Deng's return set the scene for a protracted factional struggle between the radical Gang of Four and moderates led by Zhou and Deng. At the time, Jiang Qing and associates held effective control of mass media and the party's propaganda network, while Zhou and Deng held control of most government organs. On some decisions, Mao sought to mitigate the Gang's influence, but on others, he acquiesced to their demands. The Gang of Four's heavy hand in political and media control did not prevent Deng from reinstating his economic policies. Deng emphatically opposed Party factionalism, and his policies aimed to promote unity as the first step to restoring economic productivity. Much like the post-Great Leap restructuring led by Liu Shaoqi, Deng streamlined the railway system, steel production, and other vital areas of the economy. By late 1975, however, Mao saw that Deng's economic restructuring might negate the legacy of the Cultural Revolution, and launched a campaign to oppose "rehabilitating the case for the rightists," alluding to Deng as the country's foremost "rightist." Mao directed Deng to write self-criticisms in November 1975, a move lauded by the Gang of Four. On January 8, 1976, Zhou Enlai died of bladder cancer. On January 15 Deng Xiaoping delivered Zhou's official eulogy in a funeral attended by all of China's most senior leaders with the notable absence of Mao himself, who had grown increasingly critical of Zhou. After Zhou's death, Mao selected neither a member of the Gang of Four nor Deng to become Premier, instead choosing the relatively unknown Hua Guofeng. The Gang of Four grew apprehensive that spontaneous, large-scale popular support for Zhou could turn the political tide against them. They acted through the media to impose a set of restrictions on overt public displays of mourning for Zhou. Years of resentment over the Cultural Revolution, the public persecution of Deng Xiaoping (seen as Zhou's ally), and the prohibition against public mourning led to a rise in popular discontent against Mao and the Gang of Four. Official attempts to enforce the mourning restrictions included removing public memorials and tearing down posters commemorating Zhou's achievements.