Introduction to Qinyuan: Qinyuan is a square designed with the main melody of a piano plate. Looking down from the air, the entire piano garden is just a piano. The piano keys are made of red marble, and the piano bench is a sun and moon flower bed with flowers blooming in it. Looking down at the piano garden, it looks like an angel in a long skirt, or like a vigorous modern water conservancy worker, leisurely playing the beautiful music of water control.