Three kinds are pork tenderloin, pork liver and pork loin. Bazhen Tofu and Laosanbao is a home-cooked dish, which is very popular in Tianjin. The so-called Old Sambo consists of three main ingredients: pork tenderloin, pork liver and pork loin. In addition, in order to look good, some red peppers were used. The reason why the old three treasures are popular is the special "hard core" of this dish. All three are meat, usually with no or little side dishes.