Before revision: Shaanxi Baoji-Chengdu Railway Guanyin hill Curve, on Baoji-Chengdu Railway in China, a double horseshoe and a buttrtfly curve, south of Weibin District, at Majia Dam URL
After revision: Shaanxi Baoji-Chengdu Railway Guanyin hill Curve, on Baoji-Chengdu Railway in China, a double horseshoe and a buttrtfly curve, south of Weibin District, at Majia Dam Curve.