The traditional casserole is a kind of pottery. The invention of Tao is a landmark in the development of human society, and also the greatest invention of mankind.
Legend is Yao Emperor invented the casserole, so far has been thousands of years of history. Archaeological discoveries, as early as the Neolithic period, people began to use sand pottery. Sandwiched pottery is a common type of pottery made in the Neolithic age, with red pottery and grey pottery as the main.
After centuries of improvement, the sand pottery has evolved into the casserole we use now.