The ASTM D5445-21 standard specification provides a set of graphic symbols for marking Encasement or containers to indicate special handling and storage requirements. These symbols are designed to compensate for language barriers and reduce loss and damage due to improper handling, and are especially suitable for countries where languages differ during handling or transportation. Although graphic symbols cannot fully guarantee the safe handling of goods, they provide an effective means of communication to help stevedores understand the correct handling method, thus improving the protective effect of goods. Proper protective Encasement remains the key to ensuring the safety of goods.