Li Longji launched a "congenital coup" after he ascended the throne, ending the era of Nuwa in Tang Dynasty since Wu Zetian. Then he reused many wise ministers as prime ministers, reformed official management, strictly assessed officials, and cracked down on giants to recover land. Therefore, the government decrees are unified, the society is stable, the exchanges with the west are extremely common, and the economy is rich, reaching the highest peak since the founding of the Tang Dynasty.
Li Longji changed the system of officers and men to the system of recruiting soldiers, and began to recruit soldiers. At the same time, many towns and villages have been built in some remote areas in China, horses have been raised vigorously, and the field of the army has been expanded to prepare for foreign wars. Li Longji has sent people to attack the Turks and make Mobei yield. At that time, there were 500,000 elite soldiers and more than 80,000 good horses in the Tang Dynasty, which made the countries around the Tang Dynasty willing to submit and did not dare to raise objections.
So since the country is so rich and powerful, what is the life of the people? From Chang 'an to the west of Qingji, and even to the Silk Road of the Eastern Roman Empire, there were a large number of Tang soldiers patrolling, so that Hu Bing did not dare to invade, and the bandits had disappeared. Businessmen don't need to carry weapons for self-defense when transporting goods. Along the way, the fields are connected, and even the previously barren places have appeared as rich scenery as the land of fish and rice in the south of the Yangtze River.
At that time, in Chang 'an and other cities, one stone of rice cost only 200 yuan, and some daily necessities such as cloth were also very cheap, so every household of the people lived a rich life. In all counties of the country, warehouses are also full of grain and cloth. Even in a government that collects finance, property is regarded as dirt. So I think the people at that time lived a well-off life.
Moreover, an academy was established, with a collection of 50,000 books and more than 20,000 books written by scholars in the Tang Dynasty, which can be described as "the prosperity of books, the prosperity of Mo, and the prosperity of Kaiyuan". It began to vigorously develop culture and education, cultivate talents, and allow people to set up their own private schools. Therefore, the children in the ravine also know how to be polite. This has led many famous poets and calligraphers to leave brilliant names in history, as well as many immortal poems and calligraphy and painting.