(Image credit: Linglong on Bilibili) Chinese PC maker Linglong has just introduced a tiny PC that fits into a foldable keyboard. The company shared its live presentation via video sharing site bilibili, where the presenter pulled out the actual device from his back pocket. The keyboard PC also has a built-in trackpad, so you don't need to bring a mouse to use it. Interestingly, the portable mini PC lacks a built-in display, but the presenters had one interesting reason as to why it didn't includ...