Chinese don't even really know what Email is. For most of them email is "that second chat function in QQ which for some reason is more complicated. no idea why

Chinese don't even really know what Email is. For most of them email is "that second chat function in QQ which for some reason is more complicated. no idea why anybody uses it". Also as you pointed out in the end, it's not just that you remove yourself from the Chinese internet world. You don't have access to China in general without it. It's so integrated in people's daily life that it's nearly impossible to separate online and offline any more.