Regarding Chinese manhua, I wouldn't really rely on Wikipedia too much. Having looked at the wiki page, I can notice errors with what was written there by whoever wrote it. So, here's a Chinese view on it from someone who has lived in China and reads manhua.

I think what's also ignored is the fact that Hong Kong manhua is mostly oriented towards street-fighter style themes than most Japanese manga which is more diverse. 

People seem to not pay attention to certain Taiwanese contributions as well, which are more talked about here: http://www.chinese-forums.com/index.php?/topic/36203-chinesese-comicsmanhua-taiwan-and-hong-kong/

Manhua can be:

 - Read from left-to-right or right-to-left
 - Black and White or full color (Mostly Hong Kong)
 - Weekly or Monthly releases

Manhua has distinct storylines from manga and manhwa, which is due to cultural differences. (Yes, they're not "all the same" as you would like to think and, honestly, it is quite offensive to say that they are the same)

If you read a few manhua, manhwa, and manga that deal with cultural aspects, you will notice the differences. For instance, try to compare:

- *Tales of Demons and Gods* (manhua)
- *The Breaker: New Waves* (manhwa), and
- *Chivalry of a Failed Knight* or maybe *Gate: Jieitai Kano Chi nite, Kaku Tatakaeri* (I tried to pick something comparable, yet, most Japanese manga seem to focus around overdramatic school life or just plain scifi, thus why I put 2 recommendations for Japanese manga since the later is written by a former JSDF officer).

You will notice subtle differences brought forward by the distinct cultures of all three regions. 

All-in-all, if you're not sure about something, I wouldn't suggest looking it up on Wikipedia.