Differences: Qin Shihuang burned books to bury Confucianism, Han Wudi respected Confucianism alone, and Emperor Taizong spoke widely.

* * * Similarities: They are all recognized emperors with outstanding achievements in history. Both are ending the long-term division and forming a period of great unity, all in the heyday of a dynasty. They all made great efforts to govern the country, attached importance to the reform of official administration, and created systems (such as county system, centralized system, imperial examination system) that had a far-reaching impact on later generations. They all advocate resisting foreign aggression and pay attention to resisting foreign aggression. Emperor Wu of the Han Dynasty and Emperor Taizong paid attention to foreign exchanges.

Difference: 1, Qin Shihuang practiced tyranny, with heavy taxes and heavy burdens on farmers; Emperor Wu of the Han Dynasty implemented frivolous and thin taxes to reduce the burden on farmers. Emperor Taizong also paid attention to reducing the burden on farmers. 2. Qin Shihuang advocated legalism, while Emperor Wudi respected Confucianism alone. Later, Confucianism became the orthodoxy of China feudal society. 3. Emperor Taizong was good at coachable and spoke freely, which liberated his thoughts at that time. He is also good at employing people. He is just talented. 4. Externally, Emperor Taizong paid more attention to friendly exchanges, and Emperor Wudi advocated force and launched foreign wars many times. 5. Qin Shihuang and Emperor Wudi were in the early stage of feudal society, while Emperor Taizong was in the heyday of feudal society.