That's awfully naive. China's cyber units or state actors most likely have access to Wikipedia and are not bothered by the Great Firewall. The citizens on the other hand, I agree with you.

Why wouldn't they be doing it? They are actively engaged in such campaigns in various other media for foreign audiences. Wikipedia being blocked for the Chinese general population doesn't mean The Party isn't targeting it to influence opinions of non-Chinese in exactly the same way, since it's a fantastic platform with incredible reach and an unrivaled level of trust from the public.

Anyone that does business with China understand that VPN usage is rampant (generally Shadowsocks with V2Ray and the likes, it's plug and play, ton of local companies sell it, on every markets you can buy as well), companies and people aren't actually limited by it, the people that don't circumvent it are often the ones not talking english, there is a huge tolerance as well for businesses, gov is completely aware of the mass "VPN" usage, lot of hotels as well provide you with solutions if you just ask and so-on.

Chinese is one of the most popular languages on Wikipedia

https://zh.wikipedia.org/wiki/Wikipedia:%E9%A6%96%E9%A1%B5