After the han dynasty replaced the qin dynasty what major changes did it make?

During the reign of the Han dynasty, there were a lot of changes done by Emperor Wu. He had recruited people base on their ability and not by wealth and status of the family. Their economy flourish because of the skilled people in their government offices. Second, he had reduced taxes to encourage peole to work harder. Third, he developed the "Silk Road" and established foreign trade. Fourth, he developed agriculture and encourage people to be wise on spending their earnings. And lastly, he changed the religion from Confucianism to Taoism.