That's nonsense. Searching for "广告拦截" on Baidu returns hundreds of thousands of webpages and tutorials telling users how to install and turn on ad blockers, and Chinese smartphone brands often boast that their products perform better than competitors in blocking ads. What you are saying seems like a misunderstood version of the fact that some "ads" are whitelisted by default and you can't block them painlessly, mostly from the telecom giants that provide internet access for you.