The Tang Dynasty reached a period of great stability and peace under the rule of their second leader Tang Taizong. He ruled ruthlessly and fairly which led to great success in East Asia. The Tang dynasty made many changes that allowed thwm to become successful. For example, they created a system of bueracracy based on merit. This meant that high- ranking government jobs were handed out based on a civil service examination. This ensured that only the most intellectual of people would be running the empire. The Tang dynasty was very smart in doing this because the Han dynasty did not have a beuracracy based on merit which led to the downfall of the society.
After the fall of the Tang dynasty, the Song dynasty came into power. They made changes from the Tang dynasty including areas such as the beuracracy based on merit and the military. These changes did not work out for the best however. The Song dynasty changed the system of the civil service examinations and allowed for more people to take them. The Song dynasty also increased the pay of the people to take them. The Song dynasty also increased the pay of the people to take them. The Song dynasty also increased the pay of the people who were awarded government jobs. This led to financial problems that weakened the society. The military also weakened as a result of this. During this time period in East Asia, many revolutionary advances were made in the fields of