If it still drops, take a proper amount of marinated soup, add some agar, cook for a while, and then cool to about 60 degrees. Soak the cooled beef in the soup, and there will be a film on the surface. If dipped several times, it will be very thick. Do it yourself This is also the way that beef sold in the market is covered with a shiny thick skin, so that beef will definitely not be broken.