Understanding how the internet works in China and the importance of using a VPN will ensure you stay connected and can access the websites you need.
You will most likely use the internet to stay in contact with your friends and family. The internet in China can be quite fast and good, when surfing Chinese websites, but has a couple challenges for many Western sites. Most foreign sites are accessed at much slower speed. Some are entirely blocked. A VPN service like ExpressVPN or VyprVPN (affiliate links) helps to get around the blockage.