After Liu Bang's death, Lü Hou took sole control of the government. In order to consolidate her position, in addition to killing Lady Qi, she also brutally killed many of Liu Bang's heirs. In the intricate and chaotic background at that time, there was one person who escaped the clutches of Lü Yan, and he was Liu Fei, the eldest son of Liu Bang. The following is to introduce the story of Liu Fei.
Liu Fei was a son that Liu Bang had before he married Lü Yan, and his mother was Liu Bang or the outer chamber of the pavilion chief. It is recorded in the "Records of History": "Qi mourned Liu Fei, the king of Hui, and Gao Zu Changshu Nanye. His maternal grandmother was also known as the Cao clan. "Man and foreign woman, these two words can outline Liu Fei's basic life.
After Liu Bang established the Western Han Dynasty, Dafeng had the same surname as Zongmu, and Liu Fei was made the King of Qi, with the capital linzi and seventy-three cities under his jurisdiction. At that time, the State of Qi was the largest feudal state, with a vast territory and a large population, and its wealth was also at the forefront. It can also be seen from this that Liu Fei, as the eldest son of Shu, was quite valued by Liu Bang. In the sixth year of Emperor Hui of Han, Liu Fei died, and his eldest son Liu Xiang succeeded him as the King of Qi.

So why was such a powerful prince not mutilated by Empress Lü? Why would Lü Yan let him go? There are two reasons for this.
1. Show weakness and goodwill
In the second year of Emperor Hui of Han, when Liu Fei entered the capital to meet Emperor Hui of Han, he took the initiative to sacrifice Chengyang Commandery to Lü Yan and asked Lü Hou to make this place his only daughter, Princess Lu Yuan. This move showed Liu Fei's sincerity, using the reduction of territory as a means to temporarily avoid the front. At the same time, by currying favor with Princess Lu Yuan, he won the favor of Empress Lü, so Liu Fei returned to his fiefdom unharmed.
2. The center is the person
After Liu Fei was crowned queen, Cao Shan, the Marquis of Pingyang, served as the chancellor of the State of Qi, assisting the young Liu Fei in governing the State of Qi. Cao San stayed in the State of Qi for nine years, during which time Cao San studied the Huang Lao doctrine and promoted the concept of "quiet and inaction", and the State of Qi was very stable during these nine years. After Xiao He's death, Cao San succeeded him as XiangGuo, and he carried out the edicts deployed by Xiao He during his lifetime, continuing to implement his quiet and inactive practices, which were respected by the civil and military officials and the people of Li. Because of this, Lü Yan could not find a reason to attack the State of Qi.
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