Introduction to the Sister-in-law Tree: The Sister-in-law Tree is two ancient cypress trees, one tall and one short, standing on the right side of the ancient road. The sister-in-law tree is about 70 centimeters in diameter. Although it has not been exposed to sunlight for many years, it still stands there melancholy despite the wind and rain, seeming to tell the hardships and tragedy of ancient women's pursuit of happiness and freedom.