Just a co-incidence or maybe something more nefarious?
Coincidence. There are mysterious sites in China that constantly probe every machine they can reach. I sometimes get hundreds or thousands of hits in an hour, and sometimes many attempts per day.
As long as you have a firewall, you're fine. If you don't have a firewall, you have a potential problem. If you're running just an ordinary desktop machine (not a server), you should have just about all incoming unsolicited traffic blocked.
The svchost.exe program is used to run all sorts of utility functions, including a number of essential network services, so it's not surprising or abnormal to see its name pop up in association with network activity.