Answer:
1. The purpose of the army was likely to act as guardian figures for the tomb or to serve their ruler in the next life.
2. Confucianism, also known as Ruism.
3. China's size, the mountains to the west, northwest, and southwest, and deserts such as the Gobi isolated early peoples from most outsiders. This allowed a distinctive Chinese culture to develop relatively free of outside influences and gave the Chinese a strong sense of identity.