So how did they manage to complete this space station at all when R&D is 'almost impossible'? There is no doubt that China did not develop everything from the

So how did they manage to complete this space station at all when R&D is 'almost impossible'? There is no doubt that China did not develop everything from the ground up, but to disregard the progress that they have made on top of existing technologies is rather shortsighted and disingenuous.