They're not the sort of headline-grabbing experiments that most people seem to associate with space (I don't know why they do, most science isn't very exciting), but it's facilitating a lot of science which couldn't reasonably be done without it.
[1] https://en.wikipedia.org/wiki/Scientific_research_on_the_Int...
[0]: https://www.washingtonpost.com/world/asia_pacific/china-russ...
> The Deputy Prime Minister also noted that Russia will be able to cope with the construction on its own, but if anyone wants to take part in the project, they will not refuse.
[1]: https://www.rbc.ru/technology_and_media/20/04/2021/607e83219...
i think the main reason russia wants to build the space station is for arctic surveillance. when global warming opens up arctic trade routes and resources (oil), there's going to be a lot of geopolitical shenanigans. idk if you remember when trump wanted to buy greenland and everyone laughed at him, it was related to this.