Results: 39.7% of students had abnormalities in MCH (<27pg) and 63.3% of students had abnormalities in both MCV (<80fL) and MCH; There are 3 types of Hb disease, accounting for 32.9% total (72/219), heterozygous HbE (HbAE) accounted for 24.7%; Heterozygous β-Thalasemia (β-Thal) form accounted for 7.3% and HbH form of α-Thal disease (HbH) accounted for 0.9%.