Recombinant Anti-CD32B x Anti-CD79B Bispecific Antibody (Tandem scFv-Fc) is designed to be expressed as a homodimer, which has 2+2 antigen-binding valency. This format consists of one Fc region and two tandem scFv fragments, in which the anti-CD32B/CD79B tandem scFv is fused to the Fc domain. The engineered fragment format is used to extend the half-life. This BsAb can regulate B-cell modulation. It is designed for the research of Immune diseases therapy.