Zhao Yi said this because Yu Wenyun, the emperor of the Northern Zhou Dynasty, died early, leaving a young emperor, Yu Wenchan, so Emperor Wen of Sui Dynasty, Yang Lihua's father, assisted in the administration of state affairs and once ruled the ruling and opposition parties. Later, Yu Wenzong was wiped out and the Sui Dynasty was easily established.
But is it really easy for Emperor Wendi of Sui Dynasty to establish the Sui Dynasty? In fact, we only need a little analysis to know that this view is completely wrong.
Of course, Emperor Wendi of Sui Dynasty was first and foremost an official second generation, but he was among the best among so many official second generations at that time, which was inseparable from his own ability. Because of his great power at that time, Emperor Xuandi of Zhou even tried to kill Emperor Wendi of Sui once after he ascended the throne. But for his untimely death, it is a question whether Yang Jian can survive.
Relatively speaking, Zhao Kuangyin is more likely to seize the throne, and he is also a usurper. Chai Rong, the emperor at that time, never doubted Zhao Kuangyin who seemed sincere on the surface, so he finally trusted Zhao Kuangyin to help him. Finally, Zhao Kuangyin defected in Chen Qiao and became a yellow robe man. It can be said that the emperor didn't get any difficulties.
Therefore, don't say that it is difficult for Emperor Wendi of Sui Dynasty to win the throne. In fact, Zhao Kuangyin is the easiest person to be emperor.