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Introduction to Zhang Liang's sword test: Located on the left back side of Yunyangxian, it is a broken boulder, 3 meters high and 4 meters long. It seems to have been split in the middle by someone swinging a sword. The stone is engraved with "Zhang Liang's sword test" 4 A large block letter. It is said that Zhang Liang once studied and made swords with Chi Songzi. Liu Bang went up the mountain to ask Zhang Liang to come out to help them work together for a great cause. Zhang refused without making the sword. At Liu Bang's request, he swung his sword to split the rock. The rock was split in half, and he followed Liu out of the mountain.