My Father Is the Prince

Anbei traveled through time and became the prince's only son. He also carried a useless system with him. However, his father's position as prince was very stable, and he was even more stable. He originally wanted to enjoy such a harmonious royal life and such stable prosperity and wealth, but why did he embark on the road of infrastructure construction? --Help! What is the recipe for cement? ▽ --Why do the second generation salty fish have to worry about so many things (╥╯^╰╥) --Dad, you must live longer! T^T Intention: to work hard