Staff of Nanxiang steamed buns restaurant make steamed buns in Shanghai, east China, Aug. 14, 2014. Nanxiang steamed buns production techniques were selected as the fourth batch of stateintangible cultural heritage on Wednesday. The techniques were invented in 1871 with a history of 143 years. The recipe of its stuffings and the techniques have been inherited by six generations since then. [Photo/Xinhua]