The project screened for nine mutations in four common deafness-related genes, such as c.235delC (p.Leu79Cysfs*3), c.299_300delAT (p.His100Argfs*14), c.176_191del16 (p.Gly59Alafs*18), and c.35delG (p.Gly12Valfs*2) in the GJB2 gene (MIM: 121011); c.919-2A > G and c.2168A > G (p.His723Arg) in the SLC26A4 gene (MIM:605646); m.1555A > G and m.1494C > T in mtDNA12SrRNA (MIM: 561000); and c.538C > T (p.Arg180*) in the GJB3 gene (MIM: 603324) (71). The gene discussed is SLC26A4; the disease is deafness.