“Kou Qing Lu”, which use the internationally well proofed highly potent hypochlorous acid (HCIO) that can kill many virus including the new Coronavirus，EV71(hand-foot and mouth disease), HPV virus, Influenza virus(H1N1), and common bacteria such as Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, and Candida albicans.