Batik is unique to which of the following ethnic groups

Batik, a specialty of the Miao, is a traditional textile printing and dyeing technique handed down from generation to generation by the Miao, one of China's ethnic minorities, and is known as one of the four major printing techniques in ancient China, along with tie-dyeing, pinch-dyeing, and openwork printing. In 2006 the batik technique has been approved by the State Council into the national intangible cultural heritage.