Traveling Through the Primitive World: Grandpa Founded the Country and I Supplied It

[If you disagree, you will be thrown into primitive society] [Travel + shared space + system + founding a country + becoming emperor + changing history] Grandpa traveled back in time to the primitive world, and his grandson shares the same system space with his grandpa in modern times! The materials of modern society help grandpa expand his territory! Sell ​​antiques from primitive society to your grandson for pocket money! Grandpa founded the country! My grandson is getting rich! So cool!