How many colors are there in Jiangsu sampling code?

Three kinds. Jiangsu sampling code has three colors. Namely red, yellow and green. The green code represents the health status that has been verified by the epidemic prevention data of the national government service platform. The yellow code represents the health state that the epidemic prevention data verified by the national government service platform is normal, but the on-site temperature measurement is abnormal. Red team represents the health status of confirmed and suspected cases verified by epidemic prevention data of national government service platform.