It is mentioned in Legend of the Condor Heroes and Duke of Lushan that ham is not ham sausage, but cured or smoked pork leg, also called "turkey meat" and "blue smoked". Ham was invented in Song Dynasty. The word ham first appeared in the Northern Song Dynasty. Su Dongpo clearly recorded the practice of ham in his book Talking about Things and Diet. "Ham is cooked with pig pancreas, and the oil is gone. Ham in the valley, not oily for decades, a bran cloud. "