改革开放以来,针对西方文化渗透,陈云提出了“严堵”的思想。1985年针对当时一些报刊登载不健康的内容,他明确强调要树立中央宣传部的权威,中宣都要管传播媒体。在“严堵”的同时,陈云更强调了全党要“严防”的问题。陈云认为,“严防”的关键在于加强思想政治工作,在于加强对全体党员的政治理论和思想的教育。 Since the reform and opening up, in response to Western cultural infiltration, Chen Yun put forward the idea of ​​“strict blocking”. In 1985, some unlicensed newspapers and magazines were published at that time. He clearly stressed the need to establish the authority of the Central Propaganda Department. Both of them must control the media. While “strictly blocking” “Chen Yun even stressed the issue of” preventing “the entire party. Chen Yun believes that the key point of ”preventing" lies in strengthening ideological and political work and in strengthening the education of the political theory and ideology of all party members.