After death, people will not keep their mouths shut or spit out their tongues. Stuffing something will avoid the earliest situation. Mouth grip should be used as early as possible in this respect. Later, there was a moral that after death, people's souls would leak out of their orifices, leading to the decay of their bodies. In order to avoid this situation, it is necessary to plug these holes, so ancient rich people used jade to make things with mouths, earplugs and the like. For example, in Liu Sheng, a city full of Han tombs, even the anus and even the reproductive organs are blocked by objects. You can look back at the relevant videos and materials. The most famous ones are the Jade Cicada of Han Dynasty and the Night Pearl of Cixi, both of which are used to prevent the soul from leaking out and ensure the immortality and even resurrection of the body. Personal analysis, for reference only, I hope it will help you.