1, iron farm tools; Copper is too expensive, too little and not hard enough, and stones can't turn over the soil.

2. In the late Warring States period, iron farm tools were popularized; In fact, it is often repeated.

3. Technically, it is an iron farm tool, but economically, the per capita cultivated land is reduced;

4, all over the world, is it the land of kings? Theoretically, it is national. Your land is a gift from the court. Of course, you have to do your duty.

5. If the court says to take it back, it is easy to copy the door and confiscate it. If not, it is a big discount.