Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ho-Kwang Mao is an eminent American geologist and Staff Scientist at the Geophysical Laboratory of the Carnegie Institution for Science. Mao's hometown is Jiangshan of Zhejiang Province, China. Mao's father the Lieutenant General Mao Sen, was a high-ranked official of the intelligence department of the Republic of China. Mao Sen is among the so-called "Three Maos" or "One Dai Three Maos", which were the core intelligence crew of Chiang Kai-shek.