(2) Prohibition of signs or text descriptions to express a mandatory command to prohibit certain behavior.

(3) The warning sign is indicative of danger by symbols or words, indicating that it must be careful to act, or to describe the dangerous attributes.

(4) The safety indicator sign is used to indicate the location of the safety facilities and safety services, and the main safety instructions and suggestions related to safety measures are given here.

(5) The fire signs are used to indicate the location of fire facilities and fire alarms, and indicate how to use these facilities.

(6) The direction sign is used to indicate the direction of normal and emergency exits, fire escape and safety facilities, safety services and toilets.

(7) Traffic signs are used to show the instructions and warnings related to traffic safety to the staff.

(8) Information flags are used to indicate special attribute information, such as parking lot, warehouse or telephone room, etc.

(9) The mandatory action sign is used to indicate orders to perform certain actions and precautions that need to be taken. For example, wear protective shoes, helmets, eye masks, etc.