Zhangbi Castle is located between Pingyao Ancient City and Mianshan Mountain. It drives from Pingyao for an hour along Panshan Road to Zhangbi Castle, a mysterious town in the deep mountains. This small mountain village, with only 0.12 square kilometers, is said to have been built into a well-guarded military castle in the Sui and Tang Dynasties. We went into the castle with more than 10,000 meters long, three-dimensional underground defensive fortifications, and experienced the underground military life of an ancient army soldier and general! The patio dug just above the bottom looks up at the sky. It really feels like sitting in a well and watching the sky. At the same time, there are more than a dozen large and small temples in the village. In addition to the temples dedicated to Buddhism, Taoism and Guan Lao Ye, there are also the Khan King Temple dedicated to the Mongolian people. On both sides of the road of Gubao Village, there are left-over shop facades, the village's primitive houses, the simple villagers, the ancient locust trees with willows, and the chic entrance buildings, which enable tourists to appreciate the ancient northern culture.