1. It takes 30 minutes to stew large bones with tofu in the pressure cooker.

2. It takes 30 minutes to stew large bones in a pressure cooker on gas. It takes 30 minutes to stew the big bones until they are tender. Because the pressure of this kind of pressure cooker is relatively strong, first simmer the processed large bones in an ordinary pot for 5 minutes, then move it to the pressure cooker, and then reduce the heat to low and simmer for 30 minutes.