The ancient city wall, which has a history of 2200 years, is the only relic of Changsha. The Tianxin Pavilion is situated on it. During the reinvention of the Tianxin Pavilion in the reign of Qianlong in the Qing Dynasty, "the grandeur of the south of the polar city is gathered in the Si Pavilion", which is well-known in the world and has become a place for literati to compose and chant elegant poems. Today, parks at the bottom of the pavilion and under the ancient city walls have become places for local people to gather leisurely. You can go up to Tianxin Pavilion, feel the bronze guns and iron cannons of that year, appreciate the vicissitudes of history, then go to the north outer wall, appreciate the magnificent stone carvings, and feel the historical implications of the ancient city for thousands of years. Only 32 yuan is a little expensive...