Feeding Someone Through a Portal, I Really Do Have a Throne to Inherit

Grandma said Grandpa was going to rebel and asked me to supply him with goods. Through Grandma's vanity case, Li Zhe could send all kinds of supplies over: weapons, clothes, food, and more. I don't know why, but I'd been sending Grandpa supplies for three years. It's just a rebellion, so why was it taking so long? Then one day, Grandpa excitedly told Li Zhe that they had finally unified the whole world! Unified? Wasn't he rebelling? How had he ended up unifying everything? It turned out Grandpa had built a unified world, surrounded by vassal states, with no powerful nation left that could stand against him. Li Zhe planned to bring his beautiful wives over and become the crown prince, but...