Inside China's $46B Tianshan Shengli Tunnel: World's Longest Expressway at 9,842 Feet!

Step inside one of the most ambitious infrastructure projects ever built in extreme mountain conditions. This video takes you i nside China’s $46 billion Tianshan Shengli Tunnel, revealing how engineers carved the world’s longest expressway tunnel at 9,842 feet through solid rock, snow, and freezing temperatures.🏗️🏔️