Recombinant Anti-CD64 x Anti-GD2 Bispecific Antibody (scDiabody-Fc) is a fusion protein of two scDiabodies with an Fc region. In single-chain Diabodies, an additional connecting linker is introduced between chains of the anti-CD64/anti-GD2 diabody. The scDiabody with two specificities is further fused to the Fc domain to form BsAb with 2+2 antigen-binding valency. This BsAb can retarget neutrophils cells to tumor cells. It is designed for the research of Neuroblastoma; Osteosarcoma; Melanoma; Solid tumors therapy.