In the case of these coins, "charm" in this context is a catchall term for coin-shaped items which were not official (or counterfeit) money. However, these numismatic objects were not all necessarily considered "magical" or "lucky", as some of these Chinese numismatic charms can be used as "mnemonic coins". These amulets may further have inscriptions like Trường Sinh Bảo Mạng (長生保命) which translates to "immortality" and "protect life". Such inscriptions would indicate that they were used as "protective" charms. The Chinese zodiacs appear on several Daoist amulets which were used for divination and fortune telling. Next to the image of each animal, the Chinese character for the animal is displayed. Under the Nguyễn dynasty era Emperor Minh Mạng large (often 48 millimeters in diameter) presentation coins with the inscription Minh Mạng Thông Bảo (明命通寶) were made that featured inscriptions from the Huainanzi on their reverse, it is believed that this work was chosen because it states that a monarch or ruler should embrace both Confucianism and Taoism and attain sagehood. Because the term Minh Mạng (Hán tự: 明命) can also be translated as "bright life" or "intelligent decree" the inscription Minh Mạng Thông Bảo is commonly used on Vietnamese numismatic charms. Vietnamese "Lei Ting curse charms" (or "Lôi Đình curse charms") are numismatic charms that contain inscriptions to protect its wearer from evil spirits and ghosts. It was common for people to go to Taoist masters to ask for advice, and in Taoism secretive amulets are often used in ceremonies, while most of these amulets are made from paper. Vietnamese Lei Ting curse charms can have fortune telling symbols and Taoist "magical" incantations. During the Vietnam war era Vietnamese numismatic charms with cash coin inscriptions were produced in large numbers as souvenirs for foreigners interested in antiques. In large South Vietnamsee cities like Saigon, Da Nang, and Huế, these charms usually sold for $1 or $2.