1. There are some dry conditions in the growing environment of Aucklandia, or there is a lack of water and nutrients in the soil, so the cortex of the old pile of Aucklandia is dry and wrinkles appear.

2. To restore the smooth appearance of the old pile of Aquilaria sinensis, we can consider proper watering, keeping the soil moist, adding some efficient fertilizers to provide nutrients, and regular pruning and shaping can also promote its healthy growth.