Well then, use whatever search engine isn't blocked for the country of your residence.
The same problem with sites being blocked in your country of residence may also prevent you from viewing any links that repliers post as well. Further, there's nothing to say that if those sites aren't blocked that they can supply at a competitive rate to China. This is a British-centric forum, so it's likely that any products will have been made in China, then shipped to the UK/Europe with European taxes and duties paid, so wouldn't that then make any product more expensive than the same type sourced locally in the country of origin? Also, given the nature of global supply from China and the fact that those factories turn out the same or very similar products under multiple brands, I would strongly suspect that your local market will have the same type of product under several different brand names that possibly don't appear available to Western buyers.
So, in short, I have helped you to find the type of product that in a single item will solve both the issue of converting optical and then transmitting that signal via Bluetooth, and your response has been to complain that I'm not a mind reader in knowing that Google is blocked in China. Nice.