The most special bridge in China, the train must whistle when passing by. Where is it?

The most special bridge in China, where the train must whistle, is located in Longgudian Bridge, Jingxiang Town, Lufeng County, Yunnan Province. Because of the dangerous terrain here, a young railway soldier was buried in the pier when the bridge was being repaired, so every time the train passed here, he would whistle to commemorate it.