Maybe it's not a Chinese hoax!
Just read this online so it's probably not true:
"Given that increasing temperatures have helped lead to higher alcohol levels in Bordeaux (amongst others) it is interesting that Bordeaux has just now elected to accept the introduction of other grape varieties to help mitigate this somewhat. The most famous being Alvarinho and Petit-Manseng & Touriga Nacional and some really obscure varietals. It will be limited to 5-10%"