After Yang Di Yang Guang ascended the throne, the first important thing he did was to establish the imperial examination system. The establishment of the imperial examination system has given many people opportunities and ways to enter the official career. It not only improved the social atmosphere to a certain extent, but also greatly improved the people's cultural level. This system has also become an important way to select officials in future generations, and it can also better select talents. The abolition of the Nine-grade Zhengzhi system, the abolition of this system, severely cracked down on the phenomenon of mutual shielding between officials and suppressed the corrupt bureaucratic system.

2. Dig the Beijing-Hangzhou Grand Canal

The second important thing Yang Di did was to dig the Beijing-Hangzhou Grand Canal. At first, the Beijing-Hangzhou Grand Canal was dug only for Emperor Yang Di's own enjoyment, so that he could enjoy the beautiful scenery along the way when he took a boat again. However, the Beijing-Hangzhou Grand Canal also provided great convenience for transporting materials and mobilizing troops in the later period. The appearance of the Beijing-Hangzhou Grand Canal also linked the North and the South, which also had a great influence on the trade and cultural exchanges between the North and the South, and maintained the unity of the country and famous officials to a certain extent. Today, the Beijing-Hangzhou Grand Canal is still an important waterway transportation in China, and it is also playing its role.

3. Open up territory to promote the development and unification of the western region.

In order to expand the territory and make the territory of the Sui Dynasty bigger, Yang Di often waged wars when he was in office. Emperor Yang Di turned his attention to the small countries in the western regions at that time, and he could also get more treasures by conquering the western regions, thus reopening the Silk Road. In the end, Yang Di led his troops to battle, defeated Tuguhun and successfully marched into the Western Regions. Since then, the central plains and the western regions have become more closely linked.

4. Build Luoyang City as an important economic place.

In order to strengthen the control of the national economy and maintain its dominant position, Yang Di moved all of them to Luoyang and established its capital there. Luoyang is a treasure trove of geomantic omen, with vast territory and abundant resources and flat terrain. After that, Luoyang also became a fertile ground for the national economy, which also promoted the economic development of the surrounding areas. Until now, Luoyang is still the economic center of China.