I want to know what happened to the thirteen sons of Kangxi. Great Gods, help me out.

Emperor Yongzheng, the thirteenth son of Kangxi, was an important emperor of the Qing Dynasty. His life story has been widely circulated in novels and on the Internet. Let me briefly introduce him. During the reign of Emperor Yongzheng, he adopted a series of reform measures to strengthen the central power and rectify the political system, which promoted the economic development and social progress of the Qing Dynasty. At the same time, he also paid attention to culture and education, built irrigation works, and promoted science and technology. He was a wise and decisive ruler. Emperor Yongzheng's childhood was not smooth. During the reign of his father, Emperor Kangxi, there were many internal struggles and wars, so he did not have the opportunity to participate in political struggles. After Emperor Yongzheng ascended the throne, he actively dealt with the political legacy left by his father and gradually grasped the real power to become the actual ruler of the Qing Dynasty. Emperor Yongzheng was also a diligent monarch. He constantly carried out reforms and tried to make the country stronger and more stable. He had many contacts with foreign countries to expand foreign trade and cultural exchanges, which promoted the international status of the Qing Dynasty. Emperor Yongzheng's ruling style was more rigorous. He was also very strict with his subjects. He implemented strict ruling measures, including surveillance, suppression, and revenge. His reign was also known as the "Yongzheng period" and was an important period in the history of the Qing Dynasty. During the reign of Emperor Yongzheng, he carried out a series of reforms and efforts to lay the foundation for the prosperity of the Qing Dynasty. His life story was widely circulated in novels and on the Internet, becoming one of the favorite historical topics of many people.