It can both currently produce only 0.1% of hydrogen using a green process, while also developing a new process that is 99.9% green (for the hydrogren that it produces using the new process). That means the overall production right now is probably still ~0.1% green, but the point of the article seems to be that they hope to transition to this new process, which sounds pretty cool.

And to also knock out a few other misunderstandings, I'll also address your comment below: The stats you link are for the number of plants, not the volume of production or consumption (what is claimed). Both stats can be correct if China has large plants that produce more volume than in other countries. But better yet, we don't even have to root around for the details - the article cites it's source: the World Economic Forum's latest whitepaper (June 27, 2023), which in turn cites statistica "Global Hydrogen Consumption By Country". So there you have it - China out-consumes hydrogen at a rate of about 2-times that of the next largest consumer (the United States). That seems to track pretty well, since both countries are similarly developed, and China is about 4x the size of the US by population. If you wanted to split hairs, you could say that this doesn't include volume of production. Given the incredible lead in consumption volume, I'm willing to grant them that omission.

And, not chalking this up to you, but I've seen other replies in here about how China is somehow cooking the books. That's becoming more and more obviously wrong (and more than a bit racist). As one indicator, their universities occupy 8 of the top 20 institutions in the Nature index. For those unaware, this is a premier British-based peer-reviewed journal that releases a ranking of academic institutions based on their publishing to high-impact journals. China's year-over-year change also means that they're rising on that list rapidly.