China Insider on Instagram: "The Jiaozhou Bay Tunnel in Qingdao is China’s first undersea highway tunnel—and it’s no joke. Opened in 2011, this 7.8 km beast 🐉 dives nearly 83 meters below the sea 🌊, cutting travel time between downtown Qingdao and the West Coast from 40 minutes to just 10 🚗💨 Built in just 4.5 years, it cruises through 18 fault zones ⚡ and connects both sides of the bay like a boss. It's part of a mega project with the Jiaozhou Bay Bridge 🌉 But wait—there’s more: they recent