Hollow core slabs are a new type of environmentally friendly material, made from lightweight, fire-resistant, and insulating materials, with a surface coated with flame retardants, adhesive tapes, and reinforced layers embedded within the dry slab. They offer the following advantages: 1) This product is lightweight and forms a beamless slab structure with high load-bearing capacity, significantly reducing the amount of concrete used while lowering the weight of the slab and the building, greatly enhancing the safety and reliability of the foundation's load-bearing capacity. 2) The closed cavity structure of this technology reduces heat transfer, significantly improving thermal insulation performance and increasing sound insulation effectiveness by 10–20 decibels. 2. Economic Benefits of PMX Lightweight Composite Inner Membrane: 1) Steel reinforcement usage is reduced by approximately 15%. 2) Concrete usage is reduced by about 10%. 3) Building beam height is reduced by 200–400 mm per floor. 4) Savings of 10%–15% on water, electricity, and interior/exterior wall decoration costs, approximately 18 yuan per square meter. 5) Formwork wear and tear is reduced by 50%. 6) Overall civil construction cost per floor is reduced by 3%–6%, approximately per square meter. 7) Construction time can be shortened by half. 8) Total building construction cost can be reduced by 5%–20%. 9) Total slab cost can be reduced by 10%–28%.