Three Kingdoms: Liu Bei Adopted a Son, and Grain Created a New Han Dynasty

He is in the Three Kingdoms and starts with Liu Feng. Guan Yu died in Jingzhou, Liu Feng was trapped in Shangyong, unable to return to Chengdu, unable to go to Xuchang, there was no hope at a glance, life and death were uncertain. Liu Fengxin's cool system finally arrived... Ration system [Level: L.1 (1/10000)] [Available rewards: One stone of polished rice (refreshed daily)] For every additional person in the tent, one more stone of food per day? Oh well! Liu Feng decided to live well in Shangyong and save food and grass for Prime Minister Zhuge. The Prime Minister sent him food during the Northern Expedition, and he kept having fun in the rear... But Cao Wei did not agree, because he wanted to eliminate him as a scourge. It wasn't until a few years later that Cao Wei discovered something was wrong. What about Liu Feng? The more soldiers and horses fight, the more soldiers and horses they fight? Is the territory getting bigger and bigger? Will there be more and more food? There are also white rice, potatoes, sweet potatoes... What the hell are they all about?