Because they haven't got there yet. It takes time to develop a national astronomy base as well as the engineering side. LAMOST was probably the first ambitious attempt, but it was a scientific failure. It's not clear how well FAST will do.
>>13251290If the Chinese think it's all worthless then why are they slowly building astronomy missions? You people know nothing. When it comes to astronomy the Chinese push hard on "invented here", meaning they chose unusual solutions. LAMOST was one example, another is the Chinese Space Station Telescope which will have an usually off-axis design.
