Today, 47 years ago, on February 21, 1978 (Lunar Calendar, January 15, 1978), the theory of the broad function reached the world level. On February 21, 1978, the young mathematician Zhang Zhang achieved important achievements at the world level in the study of the function theory. He succeeded in finding the organic link between the loss of the whole function or sub-pure function, the gradual value and the direction of Zhuliya (a strange direction), making specific mathematical arguments for this connection, indicating the objective laws reflected by the whole function or sub-pure function. In addition, in the case of the theory of near-value, Zhang Zhang Zhang answered four questions that have not been solved internationally for years.