His Hainuo masks produced in Yangzhou, Anhui and Ningxia are genuine. Haishi and Hainuo masks purchased through regular channels are all genuine. Hainuo Hainuo produced ordinary medical masks, medical surgical masks, and KN95 masks after the epidemic began. The procedures are complete, the approval number is complete, the standard production date and batch number are complete, and it is genuine. The place of production is Laixi City, Qingdao, and there are many brands such as Henan Hechuang and Shandong Lexiang.