Yulin, formerly known as Yulin Prefecture, is a prefecture-level city under the jurisdiction of Guangxi Zhuang Autonomous Region. Yulin is located in the southeast of Guangxi, bordering Guangdong, Hong Kong and Macao in the east, Beibu Gulf in the south, southwest of China and facing Southeast Asia. It is an important channel and key node city connecting Guangdong-Hong Kong-Macao Greater Bay Area and Beibu Gulf Economic Zone, located at the junction of South China Economic Circle and Southwest Economic Circle. Surrounded by mountains, it is high in the middle and inclined from north to south; It belongs to the subtropical monsoon climate zone, with obvious seasonal changes, warm and hot climate, high temperature and sufficient heat.