Group 1 - The core point of the article highlights the successful offline launch of a super large and long piling vessel's hydraulic cylinder, developed independently by China Railway Construction Bridge Bureau [1] - The hydraulic cylinder has a diameter of 1.6 meters, a piston stroke of 21 meters, and a rated thrust of 5000 tons [1] - This hydraulic cylinder will be installed on the under-construction 156-meter dynamic positioning piling vessel named "China Railway Construction Pile No. 1" [1]