ALC is a lightweight aerated concrete panel made from raw materials such as silica sand, cement, and lime, cured under high-pressure steam, typically used as non-load-bearing components.

PC, an abbreviation for precast concrete, is known as PC components in the residential industrialization sector. It contrasts with traditional cast-in-place concrete, which requires on-site molding, casting, and curing at the construction site. Precast concrete components are widely used in construction, transportation, water conservancy, and other fields. They can be pre-fabricated into beams, slabs, columns, shear walls, precast stairs, air conditioning panels, and other load-bearing structures.