Introduction to Shimen Pass: Shimen Pass is also known as the "Beauty Pass". Beautiful women have been selected into the palace 7 times. In ancient times, whenever soldiers went to war, family members would wait at Shimen Pass, looking forward to the return of their relatives, so people also called it "Love Pass". Inscribed on the rock wall on the west bank are the characters "The hub of southern Yunnan" and "It's as dangerous as this", which is known as the "first pass in southern Yunnan".