At this time, it is not known whether this is an official government effort to nudge Wikipedia out of the reach of Chinese citizens, or whether other issues are causing the site to be unreachable. China has a history of exercising a high degree of control over its citizens' Internet habits, with the so-called Great Firewall of China blocking access to sites deemed inappropriate by the government.
Once Wikipedia became reachable from within the borders of China, many wondered how long the access would last. Wikipedia founder Jimmy Wales told the Observer in September that the reasons for the ban were unclear to him. "We have internal rules about neutrality and deleting personal attacks [and] we're far from being a haven for dissidents or a protest site," said Wales. At the same time, Wales promised that Wikipedia would not give in to any government efforts to censor it.