From China Digital Space
拆哪 (chāi nǎ): demolish it
Demolition has a special meaning in contemporary China, as demolitions, often forced on tenants with little or no compensation, are a major source of social instability. Developers and the local government profit greatly from forcibly evicting people from their homes to build on the land. Anger over forced demolitions led the people of Wukan, Guangdong to fight the local government, eventually laying siege to their village in December 2011.
哪 nǎ means "where" or "which." Hence, chai na also sounds like the question "Where/which to demolish?" mocking the ubiquity of demolition.
Throughout China, "demolish" is spray-painted or stenciled on the sides of buildings slated for demolition. People who have had their homes demolished are called 拆迁户 (chāiqiānhù).
Chai na is included in Linguist Victor Mair's collection of nicknames for China.
Yetan (@叶檀): The newly built housings are garbage and will have to be demolished after becoming ghettos. "Demolishing" will boost GDP. If we want our buildings to last a hundred years, we need to firstly, rely on good planning and secondly, rely on the quality of the architecture. The government didn't do its part, and now there is no use in issuing an administrative order to not demolish anymore. (September 26, 2014)