How China Built 7 Insane Megaprojects that Shouldn't Be Possible

China's 7 megaproject construction: how engineers built seven world records in twenty years — tunnels through mountains, bridges across canyons, and a sea crossing nobody believed was possible. One tunnel makes cars appear to drive into a lake. Another was bored 18 kilometres through solid mountain by 2,000 workers who lived underground for five years. A 55-kilometre sea crossing built with 33 concrete boxes sunk to the seabed. A 2024 sea link that broke ten world records on the day it opened. An airport terminal so large it covers 700,000 square metres — designed by an architect who died before it was built. A solar farm constructed on the surface of a flooded coal mine. And a bridge 625 metres above a canyon floor, completed September 2025 — the world's highest. This documentary covers the full engineering and construction process across all seven — from first foundations to opening day. What's in this video: How engineers built the Dushu Lake Tunnel so cars appear to drive directly into the lake surface How 2,000 workers bored 18km through the Qinling Mountain and lived underground to do it How the Hong Kong–Zhuhai–Macau Bridge was built across 55km of open sea with 420 pier foundations How the Shenzhen–Zhongshan Link broke 10 world records — including a deck 91 metres wide over open sea How Beijing Daxing Airport was engineered and built by 40,000 workers for an architect who never saw it finished How a flooded coal mine was converted into a 150MW floating solar farm without touching the ground How the Huajiang Grand Canyon Bridge was built 625 metres above a river — the world's highest, opened 2025 Subscribe to NEXTGEN MANUFACTURING to understand the incredible machines, blueprints, and megaprojects that built our world. #ChinaEngineering #Megaprojects #HowItsMade #China #FactoryTour #Engineering #WorldRecord #Construction #InsideTheFactory #ChinaInfrastructure #EngineeringDocumentary #FullProcess #Aviation #Trending ⚠️ IMPORTANT: ABOUT THIS VIDEO -------