Introduction to Shimen Suspension Bridge: The rocks of Shimenguan are made of gneiss and marble. Its south side is called Cuiping Mountain and its north side is called Qingliang Mountain. The surrounding vegetation mainly includes secondary Yunnan pine, Yunnan cypress, and Nanzhu. , Xiao Tiezai, Lao Yabu bush jungle, and there are subtropical green broad-leaved forests such as wild banana, maple poplar, dry winter melon, camphor, and oak oak in the canyon.