Key work finished on Chinese submersible to carry humans to greater depths
Exit and observation window installed on titanium personnel sphere, state media reports

The exit and observation window have been completed on a titanium sphere – a key part of a submersible being built by a Chinese state-owned company to carry humans to 10,000 metres below sea level.
They involved some of the most important and demanding procedures that will go into building the personnel sphere, state broadcaster CCTV reported on Monday. The manned submersible is expected to undergo its first deep-sea trial in 2020.
The sphere – which is where those on a mission would spend most of their time – is expected to be the most advanced in the world, with the greatest diving depth, according to the report.
Officials from manufacturer Baoji Titanium Industry, which is developing the submersible in northwestern Shaanxi province, said it was the first time titanium had been used to make a personnel sphere for a submersible.
The metal was more flexible, so offered better protection against the massive pressure at the bottom of the sea, Wang Dingchun, the company’s deputy general manager, told the broadcaster.