Exchanging Handkerchiefs and Wishing Each Other Good Luck In China, every new couple needs to go to a park to have a video made before the evening party starts. If a new couple meets in a park, the bride and bridegroom should exchange a new handkerchief and wish each other good luck. It has to be red and have a picture of mandarin ducks. Because ducks always stay together, it means they will stay together. We have this custom so they share happiness and congratulate each other. Traditionally, the more happiness you share, the more good luck you get. So, don't forget to prepare these handkerchiefs by hand when you are going to get married.