 Teilhard prepared the first pages of his main work "Le Phénomène Humain" ("The Phenomenon of Man").The Holy See refused the Imprimatur for "Le Milieu Divin" in 1927.He joined the ongoing excavations of the Peking Man Site at Zhoukoudian as an advisor in 1926 and continued in the role for the Cenozoic Research Laboratory of the China Geological Survey following its founding in 1928.