2. ICBC invites you to apply for a platinum card, which shows that your credit rating in the bank is good and your star rating or contribution value is high. In this case, it should be easier to increase the quota, and don't return the card easily. In particular, Air China Companion Platinum also has a membership function, and points are exchanged for miles, which is more suitable for people who travel a lot.
3. If you need a platinum credit card, and there is not too much pressure on the annual fee, then there are two ways, either to spend normally for a period of time and apply for an increase in the amount. Your consumption should be very fast, but ICBC seems to apply for an increase in quota only once every six months. In addition, you can find a financial manager, and then mail some real estate licenses at a higher price to apply for increasing the credit limit.