China, an officially atheist government, closely controls the five recognized religions — Islam, Protestantism, Catholicism, Taoism, and Buddhism. China keeps an especially close look at the northwestern Xinjiang region, where Islamic and separatist ties are strong. This weekend's New York Times took a look [1] into how a rising China wants to blunt the rise of Islam.

Some restrictions include:

• Sermons at Friday Prayer cannot be longer than a half-hour.
• Prayer in public, outside the mosque, is forbidden.
• Many residents can only worship in mosques located in their cities.
• Government workers and Communist Party members cannot attend services.
• Non-official versions of the Koran are illegal.
• Only special government school may teach Arabic.
• Students and government workers must eat during Ramadan.

China seems more concerned with freedom from religion, than freedom of religion.

Source [2]