Why are many positive patients in Luoyang not red in health code?

System delay. In Luoyang, the health code of positive patients did not turn red because the system was delayed and the system did not enroll in time after nucleic acid examination, so the health code of positive patients did not turn red. Luoyang, referred to as Luoyi and Luo Jing for short, is a prefecture-level city in Henan Province and a sub-central city of Central Plains urban agglomeration. The total area of Luoyang is 15230 square kilometers, of which the urban area is 2274 square kilometers.