Buy fresh beef and mutton, which tastes good. After freezing, it will be ruddy in color. Hold the meat in a round shape with good quality plastic tape, which is about one foot long and 8.9 cm in diameter. When wrapping it, you should tightly wrap it around the place where there is air, and let the air out with a needle. Tie the wrapped ends tightly, and don't let them be tied empty, or they will be broken when they are cut out, and then they will be frozen in the refrigerator until they are all hard.