Simple. Did you actually use Baidu? I do, on a regular basis.
Let me elaborate
Andrew Ng no doubt is a famous researcher, but I am talking about a common user's experience, and no, I don't see anything that reminds of machine learning while using Baidu services.
To give you an example, search for 'Windows 7' in Baidu.
Here is the screen capture of the results I got (http://imgur.com/nNBSo3g), basically there is no mention of Microsoft's site. I do see the first is the link for people download this software for free. Ok, where is the machine learning? There could be a few reasons explaining this behavior, but I don't wish to go into those. To say the least: if it is not technical issue, it is ethical. Both are very important to shareholders.
As a control, I searched for the same on Google, and the first 2 results are from wikipedia, while the rest are from microsoft.com, mixed with news results from news sites, which are very to the point.
Another example, Baidu's SDK has opened up security holes up to 100 million Android devices (http://www.engadget.com/2015/11/02/bunk-baidu-sdk-puts-backd...), and unfortunately, this isn't the first incident in 2015. As far as I can recall, there are at least 3-4 similar issues, unintentionally or intentionally caused by technical incompetency.
Disclosure: I worked in China for some time and now still got business connection with it. I am not an armchair warrior to bash China.