Other studies also showed that the effects of Lianhua Qingwen prescription was related to virus infection, inflammation, and immunity, moreover, its main active ingredients were verified by molecular docking with angiotensin-converting enzyme 2 (ACE2), the functional receptor of SARS-CoV-2, so as to have a therapeutic effect on COVID-19 [13, 14]. Here, ACE2 is linked to viral infectious disease.