The academic confusion caused by the "gang of four" was prominently manifested in the history of Chinese philosophy. The history of Chinese logic was also affected by the confusion. Now the "gang of four" has been smashed after a merciless trial by history. Under the leadership of Chairman Hua and the Party Central Committee, scientific research has begun to make a long stride ahead. Therefore, it is possible to conduct scientific investigations and thorough discussions on a series of issues in (...) the history of Chinese philosophy and logic. Appraisal of the book entitled the Kung-sun Lung Tzu [The Works of Kung-sun Lung] is one of the issues. (shrink)