Biphenyl derivative and preparation method and use thereof in medicine

The present invention relates to a biphenyl derivative and a preparation method and a use thereof in medicine, in particular relates to a compound shown by general formula (I) or a stereomer, a hydrate, a metabolite, a solvate, a pharmaceutically acceptable salt, an eutectic or a prodrug thereof, and a preparation method and a use in the preparation of drugs for treating obstructive airways disorders, wherein the compound of formula (I) is as shown in the figure. The definitions of the substituents are the same as defined in the description.