The "Chronicle of History" says: "Huan Gong died in the sixteenth year, and declared public office. Xuan Gong died in the fifteenth year, Zhao Gong. "There are probably so many historical materials about Yan Xuangong. Although fifteen years of rule by this Yan monarch is not a long time, if we talk about merit, even if the Jin Wengong, who has only been in the position of monarch for eight years, can dominate the princes, so the fifteen years of Yan Xuangong is not short. After the Duke of Yanxiang moved to the capital, when the capital was built, it was this Duke Xuan of Yan who could really enjoy the prosperity of the capital.
The title of Duke Xuan of Yan is "Xuan", and the so-called "Xuan" is "Shengshan Zhou Wen Yue Xuan; Shi but not Cheng Yue Xuan; Good Question Zhou Da Yue Xuan; Shi But Not Secret Yue Xuan; Sincere Opinion Outer Yue Xuan; Chongguang Li Ri Yue Xuan; Righteous Question Zhou Da Yue Xuan; Neng Bu Ling De Yue Xuan; Junda Youde Yue Xuan; Li Shi Si Fang Yue Xuan; Zhe Hui Zhao Bu Yue Xuan; Shan Wen Style Bu Yue Xuan", this Yan Xuan Gong is even more praised by later generations than Yan Xiang Gong and Yan Qian Huan Gong. There is a possibility that since the Duke of Yanxiang and the Duke of Yanxiang, the two generations of the Duke of Yanxiang and the Duke of Huan of Yan have built a large number of civil engineering projects to develop the economy and the military, and the practice is more to establish rules and regulations, and by the time of the Duke of Yan Xuan, the State of Yan should be on the right track.
The successor of Yan Xuangong, all kinds of praise for Yan Xuangong can be said to have reached the peak, this monarch seems to be a very holy monarch, not only diligent in government affairs, implementing many policies conducive to the development of the country, but also good at accepting the opinions of courtiers, open and honest with courtiers, is a very virtuous monarch. Moreover, this monarch is also extremely friendly to the four tribes, and many of his actions show the heart of the monarch. Considering that the era at that time was the period of the great reshuffle of the princely states, the Yan kingdom was in the marginal area of Middle-earth, and its ability to develop so steadily was related to the low profile and dislike of fighting of the Yan monarchs.
Looking at the Tianzi or princes who have the title of Xuan, most of them are relatively positive monarchs. The earliest was King Xuan of Zhou, and during his reign there was King Xuan of Zhongxing. There are Qin Xuangong, Song Xuangong, Lu Xuangong, Wei Xuangong, etc., all of which are considered to be the sovereigns of various countries. It is just that these many propaganda are often in an era when the national strength is strong, and many rely on the efforts of each person to actively act and implement political and military strategies that are beneficial to the country, mainly for the rejuvenation of the country to accumulate wealth, and while not willing to participate in large-scale wars, they must ensure the absolute stability of the country, so it is inevitable that there will be relatively moderate decisions. Not only Yan Xuangong, but also the Xuangong of all nations can only be counted as a promising king, not the lord of Zhongxing.
In the years of Yan Xuangong, as the dispute between the Jin state and the State of Chu entered the second half, not only did the State of Chu gain the upper hand in the war of hegemony with the State of Jin, but the people of the State of Qi also worked hard to start to divide the territory with the State of Jin. Various currents of thought in society also gradually emerged, Lao Tzu and Confucius were also active in this period, and the attitude of the princely states towards various schools was mostly to recognize and use them, that is, to make society move towards a more colorful track. During this period, the State of Lu implemented the initial tax mu, the main purpose of which was to solve the financial problem, that is, the country's fiscal and taxation system at that time was serving the increasingly frequent national wars and international exchanges, and the princely states also deeply realized the reform of the state and thought about income. This may have been influenced by the developed social trends of the time.
However, the State of Yan seems to have been rarely influenced by these ideas, and even if Confucius went north, he only reached the State of Qi and turned west and south, and in the minds of many princely states at that time, and even in the minds of those scholars and sages, the State of Yan seemed to be out of place, and it did not yet have the ability to participate in the affairs of the Central Plains. In the Book of Poetry edited by Confucius and others, there are "Zhou Nan, Zhao Nan, Shao, Yan, Wei, Wang, Zheng, Qi, Wei, Tang, Qin, Chen, Juniper, Cao, And Feng" winds, of which there is no Yanfeng, or it is related to the attitude of the Central Plains people towards the Yan people, and it is also related to the fact that the Yan people did not actively participate in the affairs of the Central Plains. Yan Xuangong's title is "Xuan", and if it is interpreted in terms of today's "Xuan", then Yan Xuangong should not be a qualified monarch. Of course, the meaning of the "xuan" of spring and autumn is different from the meaning of the "xuan" of several today.