北京之春
From November 1978 to December 1979, thousands of people put up "big character posters" on a long brick wall of Xidan Street, Xicheng District of Beijing, to protest about the political and social issues of China. Under acquiescence of the Chinese government, other kinds of protest activities, such as unofficial journals, petitions, and demonstrations, were also soon spreading out in major cities of China. This movement can be seen as the beginning of the Chinese Democracy Movement. It is also known as the "Democracy Wall Movement" . This short period of political liberation was known as the "Beijing Spring".