At the end of the Sui Dynasty, there was a drought in the Central Plains, coupled with the rise of military fronts. The people of Li people were in dire straits. For a time, there was a continuous stream of people fleeing from Guanzhong to Yizhou, most of them with their families and crying. Only a small village named hulugou in the south of the Weihe River survived. The reason is that the hulugou valley behind the village has survived. The entrance of huluyu is narrow and named because it looks like a gourd. It is surrounded by high plateaus, and the middle is low-lying and humid. It is covered with green trees all the year round. The rain is not easy to drain into the dry Weishui river. In addition, it is remote here Besides the villagers, they don’t know that there is a lush corn field in huluyu, which can last for more than 200 people in the village for a year.