Tang Zong lived in an era full of crisis in the history of China. He was born in poverty, taught himself in adversity and experienced many hardships. He didn't set foot on his official career until middle age. With his talents, he reached the highest position that China people and Han people could hold in the Qing government. He had no education or early training as a professional soldier, but he became the first soldier of his generation in China. He not only won a prominent position among all the greatest fighters produced by the motherland, but also achieved the great cause of a great politician. He devoted himself to appeasement and reconstruction in the vast land destroyed by the war and achieved remarkable results.

Zuo has little contact with foreigners, and his field of work is basically out of the sight of western observers. His great achievements in the Western Expedition of the Qing Empire were not paid enough attention, but were mentioned by chance. Some people say that he is "xenophobic", which is of special significance to foreigners living in China at the end of 19. This evaluation has not become a significant motivation to arouse people's interest in his life.

About twenty-five years after Zuo died, the rapid development of society led to the decline of the Qing empire, which further concealed Zuo's great efforts to save the empire. The social process after the demise of the old regime will naturally focus on contemporary events and dilute the efforts of celebrities who have contributed to the cause that has obviously failed. Therefore, "Left" received little attention and was almost forgotten.

At that time, Zuo's life and struggle were put aside by the people of China. 1885 In the years after his death, the whole empire remembered him and praised his achievements, but with the demise of the old regime, a brand-new situation appeared. The upsurge of revolutionary enthusiasm formed a spring tide, pointing the finger at the great men of the previous generation, because they served the foreign dynasty. To some extent, the uprising that overthrew the rule of the Qing Dynasty was regarded by the Han people as a continuation of the Taiping Heavenly Kingdom Movement. The generation that successfully overthrew the rule of the Qing Dynasty can hardly expect them to appreciate the merits of those who defeated the headstream movement. However, although this century revolution was undoubtedly rooted in the Taiping Heavenly Kingdom Movement in some aspects, their ideas were far from each other. The goal of the Taiping Heavenly Kingdom is to overthrow a dynasty, not a system. Due to the cooling effect of time, a trend can be seen recently. China people are looking at the leaders of the last century with a cool eye.