Brother, Why Are You a Princess?

Li Xiao accidentally traveled through troubled times and rescued a seriously injured brother, but he didn't expect that the other person was the former emperor's princess who was living among the people. As a last resort, Li Xiao had no choice but to board the rebel ship, and was entrusted by the princess with important tasks. He conquered several states, won over the southern Miao, got close to the northern barbarians, and helped the princess overthrow the rule of the puppet emperor, turning this troubled world into a prosperous one.