Well from reading the article like a big boy I've learned that it's pure freshwater they use which is expected but lame.

As for what they're going to use it for that remains mostly a mystery. The world total for hydrogen fuel cell cars is 67,000 which is virtually nil and China aims for 50,000 of their own by 2025 which is also virtually nil. For reference they had estimated around 300 million cars 2021 and that number is on a rapid growth. 50,000 is less than 0,02%...

Further a hydrogen pipeline is not something I'd like to live near, I get it must exist for hydrogen tech to work but china + hydrogen pipeline is just a headline waiting to be written.

Personally I think they're betting on the wrong horse