You won’t have any problems finding publicly available wifi networks in China — free internet is available from hotels, coffee shops, and tourist hotspots, just like anywhere else in the world. The problem is that you won’t be able to access any sites caught up in the Great Firewall; unfortunately, you don’t get a pass just because you’re a tourist. The only way to access your usual services is to use one of the few VPNs that can still bypass China’s online restrictions.