I hate to break the news to you........but Chinese people don't eat crawfish or at least the Chinese in China. That's why all the frozen crawfish you see in the US market are from China. The Chinese sell the crawfish to the US because they don't think it is worth eating.
You may have American born Chinese eating this because of its popularity but Chinese from China don't eat crawfish.
hmm I actually saw lots of ppl in China eat that :-) It's indeed one of the most popular street food post-dinner :-)