How long is a long time? I am engaged in the catering industry, and I only know that there is nothing delicious in mutton skewers now! They won't use mouse meat, because mouse meat is more expensive than mutton. . Generally, duck meat is used, and then sheep oil essence is added. I can tell you that people who do this can't eat it! Moreover, they don't know how many preservatives have been added. Normal kebabs dry and shrink after being left outside for a day, but theirs look fresh after being left outside for a long time. This situation has been going on for a long time!