If you are worry about china government, then you should realized all network traffic include but not limited public WIFI or private WIFI, wired network, mobile network are all under the government surveillance, all ISP and network technology company need make a copy of all the data (port Mirroring) to government server, which also including but limited to call records, SMS, GPS records. They will also keep a real time record for every IP address matching to every people unless it is a NAT, in that case it will match to a place and it's owner.
That's why most of US or EU technology company will make china specific travel policy for their Key employee.
They will use a flash installed laptop and cellphone. They will do all their job on remote computer thought WebVPN and Citrix.
Which is actually not work well, since china also using BGP hijack very frequently.