Baidu is very strict about duplicate content. With the other search engines you might also have problems, if you have duplicate content but Baidu is even less tolerant. Use a robots.txt to tell what not to index and you are safe.
No links to bad neighbors and no link farms
Linking to bad neighbors and getting links from link farms isn't a good idea with any search engine but penalties with Baidu are even more severe, so you need to consider this. Also, don't put too many outbound links on your site because this also affects your Baidu rankings in a negative way.
Plan in advance
In Google you can get top rankings for a week (though this certainly isn't the norm and we don't mean you should use blackhat strategies to achieve it) but with Baidu success doesn't come that fast. In Baidu it can take 6 months or more to achieve the good rankings you will achieve in Google overnight and you need to take this into account. For instance, if you are promoting a summer-related site, you should start optimization not later than November, so that when the season comes, your site will have achieved the rankings you want.
Make sure your site is spiderable
As any other search engine, Baidu uses crawlers, so make sure your site is spiderable. Use a spider simulator to check what is accessible from your site and what isn't.
As you see, optimization for Baidu isn't totally different from optimization for any other search engine but it certainly has its specifics.
When you are done with your Baidu optimization, it won't be a surprise, if your site starts ranking better with Google as well, especially for country-specific searches. When you have so much content in Chinese and a Chinese domain name, this will inevitably help you to achieve better rankings for your Chinese search terms in any other search engine.
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