To manage the country, we must manage the Party first in a strict manner. Comprehensive and strict governance of the Party is a distinctive theme of the CPC Central Committee on the Party building since the 18th National Congress. This book interprets the thoughts and guidelines of comprehensive and strict governance of the Party from six aspects, namely 'the Party's leadership is the essential feature of socialism with Chinese characteristics', 'never slack off in Party governance', 'closely integrate thought and system in Party governance', 'carry forward work style construction', 'punish corruption with zero tolerance' and 'maintain the Party's unity with iron disciplines'.