This kind of card refers to a credit card with a limit that is too low and cannot be used for large purchases.

Cai Ka originated from ICBC, which is also commonly known as Aunt Bank in the industry. The credit card limits approved by ICBC are mostly based on deposits. Many people apply for credit cards with only a limit of 500 or 1,000. Card friends jokingly call it the card used by aunties to buy groceries in the supermarket, and the term "vegetable card" became popular. .