Introduction to the Sword Testing Stone: Located in the south of Baifu Garden, there is a gap of 10 centimeters in the middle of a huge stone, which looks like a sharp sword splitting. The full text of Cao Cao's poem "Viewing the Sea" is engraved on the south side. Legend has it that when Cao Cao was stationed here, he got a rusty sword. To test its sharpness, he raised the sword and struck the boulder. The boulder suddenly split in the middle of the lightning fire. The soldiers were amazed, and Cao Cao regarded it as a treasure. The locals called this stone the "Sword Testing Stone."