China T-union Features

• - They have 19 digits.
• - Can be validated using the Luhn algorithm.
• - Are actively issued.

Issuer identification number (IIN)

The IIN identifies the card issuing institution that issued the card to the card holder. China T-union credit cards begin with the following prefixes: 31.

Major Industry Identifier (MII)

The first digit of your credit card number is known as the Major Industry Identifier (MII). This represents the category of industry which issued your credit card. The MII for China T-union credit cards is 3 which means they belong to the Travel and entertainment category.