Fifty years ago today, on June 3, 1975 (April 24, 1975 lunar calendar), the "Gang of Four" was criticized again. On June 3, 1975, the Political Bureau of the CPC Central Committee held a meeting to criticize the "Gang of Four", which was another meeting to criticize the "Gang of Four" after May 27. Ye Jianying said in his speech that on March 1, the problem of anti-empiricism arose, and the national public opinion followed suit to promote opposition to empiricism, replacing opposition to revisionism with opposition to empiricism, mentioning only one empiricism and spared another dogmatism. This problem shows that it is difficult to master Marxism-Leninism. Some comrades read more Marxism-Leninism, not as private property, to help us learn well, and the central government should take the lead in learning from now on. Ye Jianying pointed out that the chairperson said that this time is different from Lushan Mountain. I understand it because at that time some comrades were discussing how to deal with Lin Biao. In the past, they could whisper, but now the situation has changed, and now it is not possible. If this is the case, it will not be conducive to unity. In the past, there was a period of abnormality. If it continues to develop, it will be harmful to unity. Where there are small organizations in history, the results will be bad and they will be divided. Ye Jianying also emphasized that: ("Gang of Four") mentioned the 11th line struggle without asking the chairperson for instructions in advance; it is still the case to criticize the back door; it is the main danger to criticize empiricism, or to correct it later without asking for instructions in advance. Wang Hongwen and Jiang Qing had no choice but to review at