So I'm guessing the Shenzhou program doesn't count?
https://en.wikipedia.org/wiki/Shenzhou_(spacecraft)
(Yes, I know the OP goes on to say "and used for flights to the ISS". Still irritatingly inaccurate.)
Wikipedia says "Soyuz has served as the only means for crewed space flights in the world since the retirement of the US Space Shuttle in 2011", so I guess that's wrong?
Edit: And does it still work?
You could say it makes the original statement unintentionally true.
Source: http://www.astronautix.com/s/shenzhou.html
As I understand it, China is excluded from treaties governing cooperation in crewed spaceflight that go back to the Apollo-Soyuz link-up and include other third parties such as ESA and Japan: this locked them out of the ISS program. So they had to develop their own space station, too.