China is gradually relaxing controls in many areas of life but Beijing keeps a tight grip on technology and access to media. These eight items are still off limits.
Gmail is the latest Google service to be severely restricted by Chinese regulators.
Other Google (GOOGL) offerings including Search, Sites, Picasa and YouTube are also currently disrupted, according to the company.
Google has for years engaged in a running battle with Beijing over censorship. In 2010, Google redirected search traffic from Mainland China to its uncensored Hong Kong arm and largely pulled out of the market. The relationship has improved little since then.
Determined users can still access Gmail using a Virtual Private Network (VPN), which for a fee allow subscribers to circumvent the Great Firewall.
Meanwhile, homegrown streaming video sites Youku, Sohu and iQiyi are very popular in China.