1. Abolish the well field system: Before Shang Yang's political reform, the land system in Qin was well field system, that is, the land was divided into squares with the same size and rented or cultivated by farmers. This system restricts the free sale, development and utilization of land and hinders the development of agriculture. Shang Yang's reform abolished the well field system, privatized land and allowed land to be bought and sold, which stimulated farmers' enthusiasm for production and promoted the development of agriculture.

2. Reward reclamation: Shang Yang's political reform stipulated that farmers who reclaimed wasteland should be rewarded, including tax reduction and exemption, and knighthood. The implementation of this measure has encouraged farmers to actively reclaim wasteland, expanded the area of cultivated land and improved the level of agricultural production.

3. Attach importance to agricultural technology: Shang Yang advocates the research and popularization of agricultural technology, encourages farmers to use advanced agricultural tools and technologies, and improves agricultural production efficiency. In addition, Shang Yang's political reform also stipulated the agricultural tax policy, which reduced the burden on farmers and improved their living standards.

The historical influence of teaching people to cultivate by breaking buildings;

1. Promote the development of agricultural economy: The implementation of the policy of "breaking buildings and teaching people to plow and fight" has broken the original well field system and enabled land to be freely traded, developed and utilized. This has greatly stimulated farmers' enthusiasm for production and promoted the development of agricultural production. With the expansion of cultivated land and the improvement of agricultural technology, the grain output of Qin State has greatly increased, providing a solid material foundation for the stability and development of the country.

2. Strengthening centralization: The measure of breaking barriers in Shang Yang's political reform is actually a major reform of the land system. This reform weakened the local strongmen and strengthened the central government's control over land resources. With the implementation of land privatization and free sale, the state can manage and regulate land distribution more effectively and ensure the concentration and stability of state power.

3. Promote social mobility and class mobility: the implementation of separation from buildings makes owning land a feasible way, which also promotes the social mobility of Qin State. Those farmers who reclaimed wasteland accumulated wealth through hard work and changed their original social status. At the same time, this policy has also broken the original phenomenon of class solidification, provided opportunities for the bottom people to rise, and further stimulated the vitality and creativity of society.