The Tang Empire was the most civilized and powerful country in the world at that time, and its capital Chang'an also became a cosmopolitan city. China's highly developed culture and highly prosperous economy make people from all over the world who come to China, whether they are businessmen or diplomatic envoys, proud to be Chinese. At that time, not only the capital Chang'an, but also "expatriates" from abroad settled in all parts of the country, especially emerging commercial cities such as Guangzhou, Yangzhou, Quanzhou, etc., each with more than 100,000 to 200,000 foreign expatriates. The Tang Dynasty was one of the few open dynasties in Chinese history. It was a highly confident dynasty that neither discriminated against nor flattered foreigners, but treated them as equals. It showed the magnanimity and kingly demeanor of a great country that was open to all rivers and was graceful and noble. Foreigners in China are just like Chinese people at home. They enjoy the same civil rights as Chinese people. Not only can they get rich, but they can also serve in politics and serve as officials. Many expatriates from the Arab Empire, Persia, Japan, and Korea hold official positions in the central government and local governments. In addition to accepting a large number of foreign immigrants, the Tang Empire also accepted batch after batch of foreign students to study advanced culture in China. Japan's government-sponsored students alone accepted seven batches, each batch containing hundreds of people. Private self-financed students studying abroad far exceed this number. After these Japanese students returned from their studies, they carried out "Great Reform" in Japan. From the rules and regulations to the costumes and customs, they all imitated the Tang Dynasty at that time, making the Japanese nation in a primitive tribal state leap forward a thousand years. Year. The influence still exists today, and the light of the Tang Empire shines so profoundly on the history of China and the world.

The Tang Dynasty during the Zhenguan period was the golden age of China. Commerce extends in all directions, agriculture has had bumper harvests year after year, industrial skills are exquisite, all walks of life are prosperous, and the overall national strength has been significantly improved. A prosperous dynasty of the Tang Dynasty that makes Chinese people dream about it stirs up the hearts of many people who read history!

During the Zhenguan period, the power of the Zhenguan Dynasty was unmatched by any other dynasty in China. Looking at the several powerful dynasties in Chinese history, the signs of prosperity are nothing more than a wealthy country and a strong military, as well as abundant resources and people. Only the Tang Dynasty made outstanding achievements in deep civilization (mainly referring to institutions and cultural heritage). The prosperity of the Tang Empire is evidenced by a poem by the great poet Du Fu: "Recalling the heyday of the Kaiyuan Dynasty, the small town still houses thousands of families, the rice is dripping with fat, the corn is white, and both public and private barns are abundant." In line with the high development of productivity, the international prestige of the Tang Dynasty also reached its peak. It achieved successive victories in foreign wars and maintained a continuous offensive posture for more than a hundred years. Its territory expanded extremely, and the vast territories of the Northeast, Mobei, and Western Regions were successively expanded. Incorporated into the territory of China, the western territory reached directly to the east coast of the Aral Sea (today's Tashkent city in Central Asia). In addition to the fruitful achievements known to these people, the civilization level of the Zhenguan Dynasty was also second to none in the world at that time.