Alexa has always been controversial in China, with many people criticizing her while many others like her. In any case, it highlights one issue - in the absence of other more authoritative website evaluation methods, Alexa remains the only relatively fair criterion.
I have met many webmasters before and seen numerous websites. These sites are often built for a long time, yet their Alexa rankings remain low, or much lower than expected. This is difficult to accept by common sense. One webmaster, however, gave me a different piece of information: his site quickly climbed to a high rank on Alexa despite being established not long ago...