This is the second edition of the previously published book entitled "Changes of Tiananmen _ The History of the 1989 Tiananmen Square Protests" by the same author. The first edition was completed in 1994 and published in 1996. This edition has updated the contents of the book with the past 20 some years' disclosed materials, personal interviews and researches. Besides the introduction of the causes of 1989 Tiananmen Square Protests / Tiananmen Square Incident, the book focuses on the publically concerned cases, suspicions and unsettled issues as well. The author researched into pre-incident and post-incident interactions between the government and anti-government forces as well as wrestles between the higher authorities and civil societies, probing deep into the secrets behind the backdrop, and offered new interpretations in some aspects. The work is composed of three books and 1,300,000 words in Chinese characters.