The installation of pharmaceutical cleanrooms at Xinron conforms to ISO 8 level of ISO-14644-1. ISO 8 corresponds to Class 100,000 of FS209E. To prevent contaminants from entering cleanroom, staff must enter and exit cleanroom through airlocks and/or air showers. Special clothing must be put on to trap contaminants generated by human body, as well as to minimize the particles brought into the cleanroom.