What does Hainan Health Bao's report refer to?

According to relevant data, Hainan Health Bao's report internal reference is endogenous internal reference, that is, its expression in various tissues and cells is relatively constant, and it is often used as a reference when detecting the changes of gene expression level. In order to guide the prevention and control of novel coronavirus (hereinafter referred to as "Coronavirus Pneumonia-19"), the State Council Joint Prevention and Control Agency issued "Prevention and Control of novel coronavirus (9th Edition)", which mentioned: "In principle, human samples should be detected with detection reagents containing endogenous internal reference". So now the reference in Hainan Health Bao's report refers to endogenous reference.