Introduction to Chengshan Nostalgia: Chengshan Nostalgia is one of the eight scenic spots in ancient Xianghu Lake. More than 2,000 years ago, King Gou Jian of Yue led 5,000 soldiers to fight against the powerful Wu army in the castle on the top of the mountain. He left behind many scenic spots and cultural relics that are remembered by future generations. It has become one of the best-preserved castles in the late Spring and Autumn Period.