1. Appearance: white chess has obvious grease lines, yellow-white or light yellow surface, hard texture and light weight. The grease line of Bai Qinan is not obvious, the surface is gray or grayish white, the texture is soft and the weight is heavy.

2. Aroma: White chess has a strong aroma, with obvious sweetness and fruity aroma, which will produce a unique pungent aroma when burning. Pulsatilla Cynanchum Bunge has elegant fragrance, fresh floral and fruity fragrance, and it will produce unique medicinal fragrance when burning.

3. Value: White chess is a precious agarwood with high price and collectible value. Bai Qinan is relatively common and the price is relatively low, but it is still a high-quality agarwood variety.