How to add fragrance to dark wood? Who can tell me?

As the name suggests, any water-sinked wood that can be put into water without floating and without affecting the water quality can become water-sinked wood. Many water-sinked trees are good materials for landscaping, but Among them, sinking wood and stone are probably the best materials for creating a natural effect, while also flawlessly blending with aquatic plants. It is a precious wood, also known as dark wood. It was formed because sudden natural disasters such as earthquakes caused a large amount of forest wood to be buried. Generally, it has been buried under the river bed for more than three thousand years. Only a few have not rotted. Some wood is as hard as iron after drying, and some have a unique aroma. odor. And not all trees can evolve into dark wood. So far, there are only five types of dark wood found: green bar, hemp willow, camphor, red toon, and nanmu. It is called the "Oriental Sacred Tree" by Westerners.