How to write an engagement arch slogan

The slogan is written as follows:

The arches use four-character idioms, such as, a happy marriage, a happy marriage for a hundred years, a forever bond, joy in the door, two swallows flying together, a conclusion A good match, destined for three lifetimes, a white head makes a promise, gold and stone are of the same heart, happy marriage, marriage is compatible, happy marriage, marriage is auspicious, the couple is together, etc.