Everyone in China has to and will accept cash in practice (no idea about big transactions though). Cash is also more frequent among locals in remote places.

Also if you're talking about Russia, people are switching back to cash en masse because cashless transfer between people is essentially half-criminalized. You run the risk of getting all your bank accounts blocked instantly on mere suspicion or for things outside of your control, with almost no real rules, accountability, or practical ways to push back. It's the way to avoid the runaway government process in the first place.