Reform is an important driving force to promote historical development. If a country or a nation wants to develop, it must constantly reform and innovate and keep pace with the times. However, please read the materials. (1) Shang Yang; Establish a county system; Reward soldiers.

(2) Emperor Xiaowen; The court must use Chinese, and Xianbei language is forbidden.

(3) wear hanfu; Change Chinese surname.

(4) Shang Yang's political reform developed Qin's economy, strengthened the fighting capacity of the army, and made Qin develop into the most prosperous feudal country at the end of the Warring States Period; Emperor Xiaowen's reform promoted the great integration of the northern nationalities.

(5) "slightly" (reasonable).