I was in China two months ago. While WeChat and AliPay are ubiquitous, it's not true that China is cashless. You can still use cash pretty much everywhere, but expect vendors to have to rummage for a bag of cash behind the counter then panic as they don't remember how to count money.
But honestly, it's not that different from Europe and North America. When I'm in, say, Canada or France, I'm using a Visa credit card through Google Wallet for absolutely everything. Not sure I trust Google and Visa any more than WeChat.