China has a population of about 1.4 billion and Japan has a population of about 124 million, making China more than 10 times that of Japan. In addition, Japan has a large elderly population and a small number of young people, so the gap with China in the number of young generations exposed to programming will continue to widen.
On the other hand, Japan has the advantage of having been active in technological development for the past 100 years. Taking all of this into consideration, my impression is that many technical communities in China are about 3 to 4 times larger than those in Japan.
Therefore, I expected that in some cases there might be a Crystal community in China that is much larger than in Japan, but I was surprised to hear the answer that there is none at all.
I have never heard of a company in Japan that uses Crystal as its main language, so it is probably difficult to make a living by writing Crystal in China as well. Also, from my impression of looking at CSDN, it seems that heavy, large-scale industries such as the semiconductor industry and cloud and data centers are thriving in China. (It is unclear whether CSDN is an average Chinese site or not…) As a result, there is little interest in Ruby, which is mainly popular among startups, and there may also be few fans of Crystal, which has a grammar similar to Ruby.
(Google Translation)