The straw can be divided into two categories, namely soft straw
and hard straw. Soft straw, also called yellow straw, mainly consists
of rice straw and wheat straw, which is produced in Suqian,
Huai’an, Yangzhou, Lianyungang and Nantong. Hard straw, i.e. gray
straw, involves cotton straw, branches and bean straw, which the
major portion of production is in Yancheng.