Peerless Double Heroes

This book tells the story of two time-travelers. One was a sniper from a mercenary company in his previous life. He was killed by a government sniper during a mission, and then traveled to a country called Dazhou. The other is a government army instructor specializing in special forces training, prisoner interrogation and training, and a senior officer in the development of new weapons. He died in order to travel to the Great Zhou Dynasty and become a prince. We were enemies in the previous life, but in this life we ​​have to share hardships!