Abstract: In 1930，P. Teilhard de Chardin and C. C. Young found abundant Mammalian fossils in reddish clay, when they observed and studied Jingle area in Shanxi Province. They described the red accumulation as layer A, B and C of the reddish clay and also advanced a new term—-Jingle laterite. In 1934, based on the same data, Young posed that Jingle laterite and layer A of the reddish clay are of the same age, and named it as Jingle Period aging middle part of Pliocene epoch. Recently, detailed magnetostrtigraphic measurement has been made at Hefeng Section, in Jingle, Shanxi Province, where Teilhard de Chardin and Young divided the reddish clay into layer A—-in which Hefeng fauna was discovered layer B and layer C. This study was continued to be in honor of C. C. Young. And we will report the results in the article.