The key to lean meat in tenderloin or at the tip of the back buttock is that papaya powder and wheat starch are added to the meat (some meat is too white and non-edible additives are added, so it is recommended to eat less or not). You will understand after eating the meat swallow in Quanzhou, Fujian. I've never cooked such a troublesome dish. The ratio must be more meat and less powder. Feel for yourself!