The first glass bridge across the Yellow River opened to the public recently in Zhongwei, northwest China's Ningxia Hui Autonomous Region. /Xinhua Photo 

The 689-feet-long glass bridge is a modified old suspension bridge that had the wooden deck replaced with glass. /Xinhua Photo

The bridge is more than 32 feet above the water. /Xinhua Photo

China’s second longest river, the Yellow River has been regarded as the cradle of ancient Chinese civilization, with “yellow” indicating the color of the muddy water as soil is washed downstream. /Xinhua Photo