I'm supporting it because I want us to put an end to hunger (if that doesn't sound too naive), I want us to try to starve hunger, if that makes sense, so that the factors that fuel it - corruption, displacement, poverty and all the rest - are addressed and eradicated.
If you go to the website you will see that they hope to get 1 billion in support of them and are far shy at only 3 million so if all of China could sign up tomorrow that'll be much appreciated, thanks.
I won't push it down anyone's throat because I find that people easily grow from being aware of things to actually becoming immune to it. If you stumble across something and take your own time to read about it, I find people are much more likely to sympathise.
Join if you can, if you care.