In China's Xinjiang, a lengthy highway tunnel is being constructed at an altitude of over 3,200 meters.<br /><br />Join Xinhua to discover how a dedicated team of over 2,000 workers overcome climate and geological challenges to drill the 22-km-long tunnel. <br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
