1. Master Xue's wood is as beautiful and colorful as the grain, which can effectively absorb ultraviolet rays harmful to human eyes. Therefore, it can make people feel comfortable and healthy, and can play the role of health preservation.

2. The scientific name of sea willow is black coral. Because of its dendritic growth, slender branches, flexible texture and similar shape to willow trees on land, it is named sea willow. Although it looks like a tree, through marine scientific research, it is a marine animal, belonging to coelenterate and one of Corallinae.