Why did King Jing 'an commit suicide?

In order for my son to inherit the throne.

King Jing 'an, Wang Zhiyi, the six princes of Yang, is in Xiangfan, a ghost town. He is both civil and military, but he is not as good as his younger brother, Huainan Wang, and his literary talent is not as good as his younger brother. He lost to two brothers, Yan Yi and Guangling, and began to believe Huang Lao's theory when he was obedient. He once had the idea of becoming a monk in Longhu Mountain, and gave up the road of learning Buddhism in the last two years.

At that time, the first emperor suddenly killed him with the greatest momentum, and the queen mother valued this dutiful son the most. The consorts hit it off with the leaderless civil servants. It was at that time that he wrote the poem "Raise a million troops to drive away the headstrong slaves and immediately set the first peak". After failing to seize the office, he was named King Jing 'an. Wife Pei Nanwei, son Zhao Xun. Don't hand over half a wooden horse and a peerless sword spectrum, and assassinate Xu Fengnian outside Xiangfan. In order to let his son inherit the throne, Zhao Xun committed suicide in Beijing. In grief, the emperor gave Zhao Xun a hereditary position.

The feud between King Jing 'an and Xu Fengnian;

Their feud is related to Xu Fengnian's father Xiao Xu. Xu Fengnian's father, known as the Spring and Autumn Xia Tu, was the first general in the Spring and Autumn Period. Xiao Xu, king of Northern Liang Dynasty, with his brilliant military achievements, jumped from humble cloth to the first in the Spring and Autumn Period. Under Xiao Xu's northern cool fighters, the six countries were destroyed by Xiao Xu in the Spring and Autumn Period. Because of his achievements and status, Xiao Xu can be said to be nobody's eyes.

King Jing 'an was once a prince vying for the throne, but he was not in the same camp as Xiao Xu. He was also annoyed and was flogged dozens of times. Therefore, the two men forged a deep hatred. King Jing 'an wanted to get back at Xiao Xu, and Xu Fengnian wandered around the Jianghu, giving him a chance.