According to the characteristics of commodities, some commodities that are easy to be broken, damaged and deteriorated shall be marked with the requirements and precautions in handling, general transportation and storage, such as "upward", "moisture proof", "handle with care", "lift from here", "center of gravity", "heat proof", "antifreeze", "stacking height", etc. Refer to relevant standards for commonly used signs and instructions. Dangerous goods sign if the packaging carton of dangerous goods contains explosives, oxidants, flammable compressed gases, toxic compressed gases, flammable substances, spontaneous combustion substances, drugs, highly toxic substances and other dangerous goods, the danger sign shall be clearly marked on the transportation package. Refer to relevant standards for commonly used signs and instructions. When selecting pictorial signs, the highly targeted pictorial signs should be selected according to the characteristics of commodities. The font used in the sign should be strong and powerful. Chinese characters can be considered to use "bold bold" characters, and English characters can use capital printing. Dangerous goods packaging cartons are marked with black and white images. The size of the sign should be commensurate with the carton, and the overall arrangement is appropriate. Too large or too small will affect the overall beauty.