I've been working with Bitcoinadvertising.com and I'm noticing alot of the clicks are coming from China. In light of this, i re-wrote the site in mandarin
Your kidding right? You didn't think it was suspicious that your English ad is so popular in China. China where avg wage is a tiny fraction of the US and the purchasing power of a BTC is very high. So high that someone could make good money just spam clicking on ads all day long.
No? None of that occured to you. If you used a custom landing page and some analysis software (google analytics) you likely will find that all these "interested" Chinese visitors view 1 page and spend <30 seconds on the site.