So that after Yang Guang became emperor, he didn't go to the early years of the Tang Dynasty when Li Yuan was ill. Did Yang Guang really say that he was ill? Will he die? Later, this word reached Tang Gaozu's ears, and he also understood his position in the emperor's mind.
Later, there were insurgents everywhere, which seemed to give Yang Guang a lot of face. I heard that there were almost more than 100 insurgents in the country at that time, so Yang Guangpa Tang Gaozu to suppress, and Tang Gaozu happened to encounter Turks when he suppressed, so the suppression failed.
Yang Guang took the opportunity to arrest Tang Gaozu and kill his general. Although he later withdrew his authorization, Tang Gaozu also knew what had happened. He was not the same person as before. That is to say, since then, he has some signs of wanting to rebel, but he has no reason to suffer.
Later, Tang Gaozu recruited soldiers everywhere in the name of resisting the Turks. Less than half a month later, more than 10 thousand people came to him. He made peace with the Turks and got their help. So Li Yuan called himself a general, and the eldest son and the second son were left and right generals. March into Chang 'an with about 30,000 soldiers and horses.
Tang Gaozu continued to recruit troops along the way and distributed official food to the people. More people joined his team. Later, on the edge of Chang 'an, there were as many as 200,000 troops. So many people captured Chang 'an without much effort.
In Chang 'an, Tang gaozu himself didn't become emperor. He called Yang Gang, the thirteen-year-old grandson of the emperor Yang Di, the son of heaven. At that time, Yang Di in Jiangdu became the emperor's father.