kawaii - oh yes someone noted this rule quirk over at hongkongcard.com. But one quick way is to quickly apply for a Visa Signature (for the extra 3X Rewards of Your Choice) or a Visa Platinum, make one Mannings spending on that before 28/2 and enjoy the 1,400RC cap.
HSBC counts by per ID - so you can't double up by using a supp card from your wife. However, can you persuade your wife to play?