This product is HKB11 serum-free cell culture medium, a specialized medium developed based on the concept of chemically defined (CD) formulations. It is specifically designed for high-density suspension culture of the HKB11 cell line and the efficient production of complex biological products such as virus-like particles and recombinant proteins. Its core formulation precisely regulates cellular metabolic balance and anti-apoptotic pathways. By optimizing medium osmolarity, feeding strategies, and key expression enhancers, it effectively supports vigorous cell growth and large-scale, stable production of target products while completely eliminating batch-to-batch variability and animal-derived risks associated with serum use.