No, it wasn't marketing or sales.
I don't think
@SOHEIL has been trolling; he has been putting things rather brutally, all of which could have been done with less abrasive packaging. And as for the relevance to the topic, it is this: if people want to launch objects into space, and if they don't have launchers or prototypes and the German scientists who built them in the first place, it is perfectly all right to borrow from somebody else and work furiously on figuring out how they work, on adapting them and on building their own variations, gradually evolving into indigenous stuff. That's what the Chinese did. They borrowed, they studied, they fooled around and they built more and more of their own thinking into each successive variation.
@SOHEIL 's contribution is in pointing out that stopping at the first stage, and doing nothing further to evolve is not going to cut it. He hasn't even gone into payload and content, or into control systems, or into infrastructure; if the launch vehicle issue is not addressed, no point going into those others.
Those were modelled on the Russian imports, from published accounts. They were heavily modified but wholly indigenous is difficult to swallow. There wasn't an iota of cryogenic technology floating around; where did it suddenly come in?
