① Dual-currency cards (such as those marked with UnionPay and VISA) and pure magnetic stripe cards.

② Single-currency cards (mostly) are chip+magnetic stripe composite cards.

③ There is no pure chip.

After the expiration of the dual currency, I received a new card with pure magnetic stripe. After calling customer service, he suggested that I add a UnionPay single currency card, which is a chip card. The card received today is a composite card with a chip and a magnetic stripe. I was dumbfounded. I have always stressed that what I want is a pure chip card. ? Today, I consulted two customer service staff with WeChat. If you don't ask, they won't tell you it's a composite card.