Li was a good freehand flower-and-bird painter. This piece of artwork - Hawk in the Changing Nature belongs to his favorite subject - northern goshawk. The hawk stands on pine branches in the center, and turns its head, alert to the changing world. By applying techniques of calligraphy, the painter created a simple but unique figure in vigorous and unrestricted style, making it an excellent example of freehand flower-and-bird painting.