(1) The main feature of the VISA card is that the front of the card has the laser anti-counterfeiting logo of the dove of peace and the Visa trademark. The card number "4" starts with 16 or 13, and the first four digits are consistent with the printed number under the card number.
(2) The main features of MasterCard are: the front of the card has a double anti-counterfeiting mark and MasterCard trademark "MasterCard", the card number starts with "5" and the length is 16 digits, and the first four digits are consistent with the printing number under the card number.
(3) The main feature of American Express Card: The front of the card is a samurai head, the card numbers begin with 34 and 37, and the length is 15 digits. The blue trademark "Amex Express" and the card number are displayed on the back of the card.
The main feature of Diners Club card is that there is a circular Diners Club logo on the front of the card, and the words "DINERSCLUB INTERNATIONAL" are printed on the card surface. The card number starts with 30, 36, 38 and 39, and the length is 14 digits. There are gravure card numbers and three anti-counterfeiting numbers under the signature strip on the back of the card.
(5) The main features of JCB card: the front of the card has laser anti-counterfeiting logo, JCB letters on red, green and blue background, and the words "JCB INTERNATIONAL" are printed on the upper right of the card face. The card number starts with 35, and the length is 16 digits.