Chen Qin 
Great People of the Northern Warlord 
Life in Warlord Regime

This book depicts characters of a large number of warlord directors and politicians during Beiyang Warlord period such as Yuan Shikai, Sun Chuanfang and so on and reveals plenty of secrets, which overturns the understanding of warlords and restores the real situation during Beiyang Warlord period. Readers can find cold humor in military men and invariable human nature in conspiracy.