Installation sequence of safety signs

Article 9.5 of Safety Signs and Their Use Guide (GB2894-2008) stipulates that when multiple signs are set together, they should be arranged from left to right and from top to bottom in the order of warning, prohibition, indication and prompt types. From left to right, from top to bottom, it is: warning to be careful of toxic substances, prohibiting carrying inflammable and explosive substances, instructing to wear safety helmet, and prompting the ambulance station.