Qiongzhou.
At the nearest beach to a land-based launch site, Xinyuan Company had built a towable floating launch platform, surrounded by two semi-submersible ships.
The cranes on the semi-submersible ships lifted a super-long container with a black external steel structure, measuring 5 meters in diameter, and moved it above the "口"-shaped floating launch platform, gently lowering it until its tail was just above sea level.
The workers on the floating platform took some time to pull out several metal cables from beneath the water's surface at the center and tied them to the steel frame on the upper part of the container; these metal cables were connected to the ballast that had sunk to the bottom and could be retracted or extended by underwater motors.
