That used to be the case, but is not so much anymore: for example, Reuters filmed the launch today live. Wenchang spaceport, on China's Hawaii-equivalent island of Hainan, which you can even visit visa-free in pre-COVID times, has become a major Cape Canaveral-style space tourism destination with rocket watchers gathering for launch picnics, streaming live, etc. Today's launch was from the other major spaceport at Jiuquan though, which is the middle of nowhere deep in the Gobi Desert.

That said, the Chinese space program has deep military roots and every Chinese astronaut to date is an air force pilot, so we're not going to see NASA-style transparency anytime soon.