A potent aphrodisiac drug applied in advance to Su Xi's wine cup. It is not easy to obtain; only no more than three brothels in Dongjing City trade in it. Su Qing purchased it using money from selling Grandmother's white jade Buddha. The drug caused Su Xi to lose control and be caught in a disgraceful scene with stable hand Gu Yuanshan in the stables. Xue Ning anticipated this and ensured the drug ended up in Su Xi's cup instead of her own.
