As Lv Zhi's rival in love, Miracle was insulted as "the servant of mankind". Why did Kibo survive and eventually become a queen?

There are two reasons why Lv Zhi was able to bypass Gilbert's mother and son when he "killed Sifang":

First of all, Ji Bo and Lv Zhi are in the same boat. At first, Ji Bo was Wang Wei's concubine. When Ji Bo was a child, she was told that Ji Bo was the mother of the future son of heaven and Ji Bo was Wang Wei's concubine. Wang Wei broke his agreement with Liu Bang to attack Chu for his son's sake. Liu Bang was furious when he learned that he had sent someone to destroy Wang Wei, so all the women in Wei Palace became prisoners and went to Liu Bang to be maids and handymen. Later, Ji Bo mistakenly became the concubine of Liu Bang and gave birth to Liu Heng.

But after she gave birth to Liu Heng, she didn't find favor. Liu Bang probably forgot her long ago. In the harem, it is difficult to live a woman who is not loved by the emperor. Even Lv Zhi must be carefully planned to keep herself and Liu Ying, not to mention a woman without foundation and status. Therefore, Ji Bo's life in the harem is very difficult, and even the maids around him dare not offend, which makes Lv Zhi feel that Ji Bo and she have something in common and are in the same boat.

Second, in Liu Bang's harem, her uncle was very low-key and even bullied. Liu Bang hasn't seen her for a long time, and Ji Bo didn't deliberately compete for favor. He just lives with his son carefully and wholeheartedly. He didn't play tricks to compete for favor like Mrs. Qi, being spoiled and bossy, facing each other head-on, which made him suffer. Ji Bo herself knew who was the boss in the harem and whose son ascended the throne in the court after Liu Bang's death, so at first, she didn't have the heart to compete for favor, but also to leave a smooth road for herself.

To sum up, I personally think that Lv Zhi spared Ji Bo for two reasons: First, he was in the same boat; Second, Ji Bo never competes with others, nor is it an enemy of Lv Zhi.