During the Warring States Period, why was Qin the most powerful country?

Mainly because of the success of Shang Yang's political reform. In 356 BC, Shang Yang began to reform with the support of Qin Xiaogong. The law provides that:

1, the state recognizes that land is private and allows free trading.

2. Those who reward farming and produce more grain and cloth can be exempted from corvee.

3, according to the size of the military, awarded a title and Tian Zhai, abolished the old aristocratic privileges without military.

4, the establishment of county system, by the monarch directly sent officials for governance. After Shang Yang's political reform, Qin's economy developed, and the combat effectiveness of the army was constantly strengthened, and it developed into the most prosperous feudal country in the late feudal period.

Extended data:

1, Shang Yang entered Qin State from Wei State, and put forward a set of reform and innovation development strategies, such as abandoning ore fields, emphasizing agriculture and mulberry, rewarding meritorious military service, implementing unified survey and establishing county system, which won Qin Xiaogong's trust and made him a regular in Zuo Shu. In 356 BC and 350 BC, the "abandoned mining fields, opened up buildings, implemented the county system, and rewarded the agricultural weaving war" twice.

2. Shang Yang advocated "standing at that time, courtesy follows things". The idea of historical evolution refutes the so-called "legalist" and "etiquette" of the old aristocracy, and makes public opinion preparations for the implementation of the reform.

People's Network-Which country is the strongest among the Seven Heroes in the Warring States Period? Explain in detail the main contents of the two Shang Yang reforms.