Yang Guang, also known as the Sui Yang Emperor, was an important figure in Chinese history. During his reign, although there were some major construction projects and reforms, his tyranny and extravagance ultimately led to the fall of the Sui Dynasty. Throughout his life, he had many children, but specific details about them are not well-documented in history.

According to the "Records of the Sui Dynasty," Yang Guang had 21 sons and 19 daughters. Among these children, some were killed by the Tang Dynasty after the fall of the Sui, while others were adopted by the Tang. Among them, the most well-known are Yang Guang's second son Yang Jian and third son Yang Xiu. Yang Jian was killed after the fall of the Sui, while Yang Xiu was adopted by the Tang and later became an important official.

Li Yuan, also known as the Tang Gaozu, was the founder of the Tang Dynasty. He launched the Xuanwu Gate Coup at the end of the Sui Dynasty, overthrowing it and establishing the Tang Dynasty. After his accession to the throne, his approach to dealing with Yang Guang's children was both severe and benevolent.

On one hand, Li Yuan took a severe approach towards those of Yang Guang's children who participated in anti-Tang activities. For example, Yang Jian was killed after the fall of the Sui, and Yang Xiu, although adopted by the Tang, was also under strict surveillance. This was because Li Yuan needed to consolidate his rule by preventing anyone from using Yang Guang's children against him.

On the other hand, Li Yuan showed benevolence towards those of Yang Guang's children who did not participate in anti-Tang activities. For instance, he married some of Yang Guang's daughters to important officials of the Tang Dynasty and appointed some of Yang Guang's sons to key positions. This was because Li Yuan needed to stabilize his regime and win the hearts of the people.

Overall, Li Yuan's approach to dealing with Yang Guang's children reflected both his severity and decisiveness as well as his benevolence and wisdom. This was also a crucial factor in his successful establishment of the Tang Dynasty.

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