Nanobodies have many advantages such as small molecular weight, simple production methods and easy large-scale production, and are the most promising new antibodies in recent years. The most attractive advantage of nanobodies is the ease of modular design and the rapid construction of new multi-functional antibody drugs. Pregene screened a number of high-affinity and high-specificity nanobodies through a self-built high-throughput nanobody screening platform and built core products: For CAR-T cell agents with BCMA-targeted humanized nanobody as the antigen recognition region, the Company owns a series of core technologies including nanobody discovery, screening, multi-functional nanobody construction, large-scale fermentation production, etc.