China's undersea life-support tech proves its mettle in key tunnel test #coolchina

On August 17, workers deep beneath the sea replaced shield #machine cutters on the world's longest undersea high-speed rail #tunnel – a high-pressure job that put China's own #hyperbaric life-support #technology to the test. Once open, the tunnel will slash travel time between the coastal cities of Ningbo and Zhoushan in east China's Zhejiang Province to just 26 minutes. 📺 Subscribe to our YouTube channel and stay updated with our latest analysis and interviews:👇 https://www.youtube.com/channel/UCgrNz-aDmcr2uuto8_DL2jg 👈 Download our APP on Apple Store (iOS): https://itunes.apple.com/us/app/cctvnews-app/id922456579?l=zh&ls=1&mt=8 Download our APP on Google Play (Android): https://play.google.com/store/apps/details?id=com.imib.cctv For more: https://news.cgtn.com/news/2026-08-18/China-s-undersea-life-support-tech-proves-its-mettle-in-key-tunnel-test-1PIoYLEki40/p.html Most watched videos: Impossible Challenge: 30 seconds to count banknotes BLINDFOLDED https://www.youtube.com/watch?v=ZmP_Ybj-jws Impossible Challenge: Gymnastics Boy Arat Hosseini from Iran! https://www.youtube.com/watch?v=8sxX--U4c8w Impossible Challenge: How to calm babies in 5 seconds? https://www.youtube.com/watch?v=kR3q9sXM7WA