When the pre-class bell rang, Zheng Qing was still hard at work reciting 'Ephedra Almond Licorice Plaster Soup.'
This is an ancient prescription, mainly used to dispel wind-evil and clear the lungs to relieve asthma. The medicinal materials used in the prescription are quite simple, just the ephedra, almond, licorice, and plaster mentioned in the soup's name.
This prescription is included in the appendix of "Standard Potion: First Year College," introduced to students as a basic application of ephedra.
As for the written assignment assigned by Professor Li in the last class, Zheng Qing had given up on it. However, memorizing a prescription that includes ephedra might still be worth a try, as long as he picks the right one.