5.2.1　The clean operating department must be divided into a clean area and a non-clean area. A buffer room or pass-through window must be provided between the clean area and the non-clean area

5.2.5　The plan layout of the clean operating department shall adopt effective purification flows separately for personnel and articles (dressings, instruments, etc.) (Figure 5.2.5, figure omitted here); the purification procedures shall be arranged continuously and shall not be interrupted by the non-clean area

5.3.6　Exposed materials in the clean operating department that come into direct contact with indoor air must not be made of wood or gypsum