tiandengxianIntroduction：Tian et al. Introduction: Tiandeng County is located in the southwest of Guangxi and belongs to Chongzuo City, Guangxi. It is connected to Longan and Pingguo County in the east, Daxin County in the south, Jingxi County in the west, Debao County in the northwest, and Tiandong County in the north. In 1952, Zhenxiang County and Longyan County were merged into Zhendu County, and in 1957, Tiantian County was renamed. The county town of Tiancheng is 125 kilometers away from Nanning, the capital of the autonomous region. The southwestern county border is 9 kilometers away from the Sino-Vietnamese border. The county has a maximum horizontal distance of 64 kilometers from east to west and a maximum longitudinal distance of 63 kilometers from north to south.