How do I make sure my new website is not blocked in China?

I am not sure how familiar most are with China, but I do a lot of work with them and have a website I want to begin, but one aspect of this project is that I do not know if it will be blocked or not, and do not know how to know. Sites such as Google Blogspots and Personal Wordpress sites are generally all blocked and some sites are blocked sometimes and not others. Is there a way to know and make sure mine won't be?

Anyone with this knowledge, please share.

If your targeted visitors are all from China, I recommend you consider hosting your site with a webhost in China for the following reasons:
1) less likely to block
2) closer to your audience (generally, you want your servers to be closer to your audience to decrease server loading/routing time)
3) SEO - most likely you'd like to be decently "searchable" in search engines and having a Chinese IP would make you more "searchable" to your Chinese visitors and search engines

Unfortunately, the only way to know if you're blocked is when your visitors complain they can't get to your website.

You can't. It'll be impossible to stop them, without doing anything illegal. Just avoid anything that'll piss off the CCP cronies off. Like for instance, you don't want to mention that the CCP ruthlessly MURDERED harmless, peaceful protesters countless times.

You should choose a web hosting company which is not blocked in China , you can check review of top ten web hosts at website like http://aplis.net/ .

They will only block something that is critical of China's behaviour or deeds, or anything negative towards China.

Ok it is easy to slove this proplem .. open skype programe and add any one from china and ask him about you're web site ..

Say a few things about how much you support communism.