In addition to the door openings, a concrete waterproof sill with a height of not less than 120mm shall be set up around the kitchen, toilet, floor slab with waterproof requirements, inter floor setback, top terrace, platform, etc., and poured together with the floor slab. In GCL2013 software, the waterproof sill can be arranged with ring beam, and the top of the ring beam is adjusted to "floor bottom elevation+ring beam height"