From Los Angeles Times (link):
In a society where caring for parents is no longer a given, the state has stepped in. Shirkers face public shaming, fines, even prison.
In Shanghai, the Nanjing East Road Neighborhood Committee recently took to public shaming to ensure that people attend to their aging parents. Anyone who doesn’t visit at least once every three months faces having his or her name posted on a community signboard.
And then there’s the Chinese government itself: Shirkers face five years in prison for failing to support or take care of their parents.
See also wikipedia’s “filial piety” and “the Classic of Filial Piety” (bilingual)