Why Twenty Eight Causeway Cake is listed as a non-heritage item

Has a thousand years of history. Twenty-eight all gong cake, is the ancient town of Jiangnan twenty-eight all of the Han traditional festivals special pastry, has a history of 1,000 years, so it is listed as intangible cultural heritage. Jiangnan ancient town, is a collection of concepts, in geography, referring to the "ancient towns south of the Yangtze River", especially in the Jiangnan water towns as a typical, representative of: Jiangsu Zhouzhuang, Luzhi, Tongli, Zhejiang Xitang, Wuzhen, Nanxun.