When craftsmen hold saws and slowly cut along the grain of wood, they seem to be engaged in a dialogue with the wood that transcends time and space. Every inch of wood texture has become a bridge for the deceased to communicate with nature. Fingertips caress the warm surface of wood, touching not only the wood grain but also the warmth of three generations of craftsmen. This temperature is a witness of the accumulation of time and a symbol of the inheritance of craftsmanship. The mortise and tenon technique is one of the important techniques in the production of American wooden coffins. In the process of making coffins, craftsmen use exquisite mortise and tenon techniques to tightly connect various components together. The tight fit of mortise and tenon joints reflects the craftsmen's attention to details and pursuit of quality. Every joint of mortise and tenon has been carefully designed and repeatedly debugged. Craftsmen will choose the appropriate mortise and tenon form based on the characteristics of the wood and the structure of the coffin to ensure its strength and durability. The application of this traditional craft not only endows American wooden coffins with unique cultural connotations, but also turns each coffin into a work of art.