Why did the ancient coffin be made of heavy wood instead of stone?

Black wood, also known as ancient sinking wood, oolong wood, ebony, sinking wood, carbonized wood, oriental Shenmu, etc. Historically, dark wood was generally used to make coffins or small utensils. Officials, dignitaries and literati all regard gloomy wooden furniture and gloomy works of art carved from ancient wood as family heirlooms, treasures of town houses and things to ward off evil spirits. Throughout the ages, especially in the Ming and Qing Dynasties, black wood became the first choice for emperors to build palaces and make coffins. In the Qing dynasty, the emperors even listed it as a special material for the royal family, and the people could not use it privately.

Dark wood itself does not have the function of antisepsis and preservation of corpses. In ancient times, dignitaries regarded black wood as a superior longevity material because of its role in ward off evil spirits.