cicilau

1 thing: the monetary gift you're giving is NOT 禮金, it's 人情 (禮金 is what the groom / groom's family gives to the bride's family).

Last time I just put the 人情 in a red pocket, then put the red pocket in a card congratulating the new couple. You don't need to state the amount you're paying on the card.....that seems tacky to me.