AI Tutorials & Future Tech on Instagram: "China has been stitching its coastal cities together with a network of bridges, islands, and underwater tunnels. One of the most ambitious links connects Shenzhen and Zhongshan across the Pearl River Estuary: a 28 km immersed-tube megaproject built to withstand typhoons and heavy marine traffic. The route combines long-span bridges, artificial islands, and a deep underwater tunnel to shorten travel times, improve regional logistics, and integrate two maj