Here is a concise summary of the provided text:
**Setting:** The Ming Dynasty, in the imperial palace of Emperor Zhu Yuanzhang (Lao Zhu).
**Plot:**
1. A beggar (revealed to be Prince Wu, aka Zhu Su, the emperor's fifth son) infiltrates the prince's mansion, but is surprisingly saluted by guards who recognize him.
2. Emperor Zhu Yuanzhang discovers a diary, "Tiandao Diary", belonging to Zhu Su, which expresses rebellious thoughts and frustrations with imperial life.
3. As the emperor reads the diary, his emotions shift from anger to surprise, learning that Zhu Su:
* Criticizes the emperor's policies and workload.
* Evaluates his brothers as potential successors, deeming them unfit or already doomed (including one who will die young).
* Considers rebelling to avoid being demoted by a future emperor (his nephew) and to achieve his dream of being a "free prince".
* Claims a 99% success rate for his rebellion, with 50 loyal guards at the ready.
4. The emperor's reaction turns from anger to a mix of fear and outrage upon realizing the potential threat to his life and the palace's security.
**Key Themes:** Imperial intrigue, succession, rebellion, and the complexities of royal family dynamics.
Here are the key facts extracted from the text, numbered and in short sentences, without opinions:
1. A beggar climbed over the wall and entered the prince's mansion, where he was surrounded by guards.
2. The guards recognized the beggar as King Wu in disguise and knelt down to salute him.
3. The prince of the mansion was a famous demon king in the capital.
4. The prince had a habit of writing in a diary every night after returning home.
5. The diary somehow appeared in the imperial palace.
6. Zhu Yuanzhang (Lao Zhu) discovered the diary and read it, becoming enraged.
7. Zhu Yuanzhang is the emperor of the Ming Dynasty.
8. The diary belonged to Zhu Su (Xiao Wu), the fifth child of Zhu Yuanzhang.
9. Zhu Su expressed dissatisfaction with his life as a prince and the pressures of potentially becoming emperor.
10. Zhu Su mentioned a "policy of supporting the clan" implemented by Zhu Yuanzhang.
11. Zhu Yuanzhang had proposed a three-level hierarchy for his sons:
* First level: Zhu Biao (son of Zhu Chongba)
* Second level: Sons of Empress Ma (including Zhu Su)
* Third level: Sons born to other concubines
12. Zhu Biao was initially intended to inherit the throne but died in the 25th year of Hongwu at the age of 37.
13. Zhu Yunwen was next in line to inherit the throne after Zhu Biao's death.
14. Zhu Su claimed to have a 99% success rate of rebellion with his current strength.
15. Zhu Su had allegedly arranged for 50 guards to be stationed near Zhu Yuanzhang, ready to strike on his command.