This product is a well-defined serum-free medium specifically formulated to support the steady-state maintenance and efficient proliferation of human embryonic stem cells (hESCs) in microencapsulated three-dimensional culture systems. Its unique formulation precisely regulates the synergistic effects of extracellular matrix components and survival factors to effectively mimic the in vivo microenvironment. This ensures stem cells maintain exceptional viability and normal metabolism at high cell densities within microcapsules while sustaining their undifferentiated state and pluripotency over extended periods. It provides a stable and reliable culture foundation for large-scale stem cell expansion, directed differentiation studies, and the development of cell therapy products based on microencapsulation technology.