After Chen Shaojie obtains the system…
…to explain it in a more illustrative way, he’s like a WiFi freeloader. To access the Internet, he must stay close to the WiFi router.
Free WiFi signals have very limited range, so he can’t move too far away.
…it takes serious skills to freeload successfully.
P.S. The author will take you on a ride around this wonderful world and show you the beautiful scenery along the way.