I didn't say anything about building cheap stuff for "western consumers", those are your words not mine. All I said was their manufacturing capabilities are currently unmatched but they are in no way leading in terms of the cutting edge stuff when it comes to either technology. It just seems counter-intuitive to me that being in that position they are limiting exports of supercomputers and drones.

For that matter I'm really curious which countries are clamoring for Chinese supercomputers and drones?

As for the history of Chinese industrialization I honestly don't see how that matters when it comes to setting export limits. It is purely a trade issue and usually when exports are limited in this fashion it is because the technology is perceived to provide some kind of advantage to whoever has it. Cryptography software comes to mind as a good example of something that the U.S. government tried to control with export laws for a long time. Carrying that analogy forward I don't see how supercomputers or drones provide any kind of advantage since most countries I can think of that could benefit from buying the technology from China do not pose a threat to it and those that wouldn't be buying from China and instead building things in-house are already equal to or beyond China's capabilities. The export limit in both instances is counter-intuitive because nobody wins from this arrangement.