China uses a massive espionage network of cameras, facial recognition software, sensors, surveillance of personal technology, and a social credit system as a means of social control of persons living in China. The Chinese democracy movement, social activists, and some members of the Chinese Communist Party believe in the need for social and political reform. While economic and social controls have been significantly relaxed in China since the 1970s, political freedom is still tightly restricted. The Constitution of the People's Republic of China states that the "fundamental rights" of citizens include freedom of speech, freedom of the press, the right to a fair trial, freedom of religion, universal suffrage, and property rights. However, in practice, these provisions do not afford significant protection against criminal prosecution by the state. Although some criticisms of government policies and the ruling Communist Party are tolerated, censorship of political speech and information, most notably on the Internet, are routinely used to prevent collective action. By 2020, China plans to give all its citizens a personal "Social Credit" score based on how they behave. The Social Credit System, now being piloted in a number of Chinese cities, is considered a form of mass surveillance which uses big data analysis technology.