Single currency for BOC Great Wall International Card: the annual fee cannot be waived (less than USD50). If you spend US dollars abroad, your parents will repay the loan at home (buy US dollars at the exchange rate of RMB against the US dollar and deposit them into the card. It is recommended that Leave the statement at your parents’ home)
Dual currency: annual fee, waived after 5 purchases. Assuming that you apply for RMB/USD dual currency, your consumption in any foreign country will be settled in US dollars based on the exchange rate of the day. Repayment: Parents can purchase US dollars in China and deposit them into the card, or directly deposit RMB, but they must call 95566 to purchase foreign exchange and repay.
In fact, there is no handling fee for the two types of card repayments, and some are only the exchange rate of RMB against the US dollar. And the exchange rate of Bank of China is okay. In addition, international cards have chips and are safer, but dual-currency cards do not.
Finally, if you have no source of income, your parents can only apply for the main card and you can apply for the supplementary card.