Guchanghua City is the county town of Guchanghua County, Hainan Province, located in the western coastal of Changjiang County, more than 50 kilometers away from Shiqi Town, Changjiang County, the original site is located in Changcheng Village, Changcheng Town. It is recorded that Guchanghua City Pool was built in the Ming Hongwu years. During the Yongle years, Changhua County was disturbed by the sputum, and Changhua County was built with stone brick walls, two and a half kilometers in length, six meters high and five meters thick. By the Orthodox ten years (1445 AD), Zhou Zhen of Changhua Zhixian opened a five-foot-wide deep trench near the wall outside the city pool, and Changhua City Pool formed a strong city defense system. Later, due to hurricanes and typhoons, the city wall was damaged and repaired. The modern city wall is square, 2 kilometers long, there are remnants of the city brick on the wall, and the relics of the trench are clearly visible. The moving story of "Yifu Yujiao" is circulating in the Guchanghua City area. Guchanghua City has a history of more than 2,100 years since the county rule was set up. It is said that the ancient Changhua City is now preserved historical monuments and cultural relics, in addition to the ancient ring earth walls, trenches, as well as Zhao Ding Yiguan Tomb, Zhiping Temple Monument, Nanmen Garden Tombs, Junling Five Temple Site, etc. Recently, I arrived in Guchanghua City to find ancient times. The ancient city is quite modern. The houses are small and small. After several explorations, I saw that there was no protection for the ancient ruins of the surrounding earth wall. The mounds of vegetation about 30 meters long (the last four photos) and an old house in modern times.