Construction is underway at the second undersea tunnel in Qingdao, Shandong province, on April 20. With its main section measuring 15.89 kilometers, it is expected to be the world\’s longest undersea h
Enjoy life, Inspiring work
Enjoy life, Inspiring work
Construction is underway at the second undersea tunnel in Qingdao, Shandong province, on April 20. With its main section measuring 15.89 kilometers, it is expected to be the world\’s longest undersea h