We get this question all the time and the answer is ‘YES’. The Chinese government has blocked many “social media” sites such as Facebook, Pandora, YouTube, Snapchat and others. Skype works fine here, so you won't have any problem communicating with your friends and family. Apart from living on the other side of the world, you’ll have to adjust to different standards and apps to use. Wechat is your one-stop shop app for everything. From messaging, group chat, calling a taxi, and even translation, Wechat is by far your most useful resource while in China. Also, consider this, Google is blocked so you’ll become familiar with Yahoo and Bing a lot more.
Before you start bidding farewell to your Facebook friends, look into a Virtual Private Network or VPN. Recommended VPNs include Astrill and Express VPN. That being said, the "high-speed" Internet is typically pretty slow and probably not what you’re used to in a western country.