In the late Sui Dynasty, there was a severe drought in the Central Plains, and the soldiers were everywhere, and the people were in dire straits. For a time, people fled from Guanzhong to Yizhou. Most of them took their families with their families, and the crying sounds were heard one after another. Only a small village called Hulugou, south of the Wei River, survived. The reason is that the terrain of Huluyu behind the village: Huluyu entrance is narrow and named because it looks like a gourd. It is surrounded by high plateaus, and the middle is low-lying and humid. The plateau is covered with green trees all year round. The rainfall is not easy to leak into the dry Wei River. In addition, it is originally remote, so except for the people in the village, I don’t know that Huluyu has lush corn fields. The corn that lasts several miles is enough for more than 200 people in the village to eat for a year.