In the ceremony of Longfengtang, under normal circumstances, the participants are couples or lovers who are about to get married. However, it doesn't mean that there can't be others in the Dragon and Phoenix Hall. As long as necessary, other relatives and friends can also participate.
It should be noted that the Dragon and Phoenix Temple is a traditional cultural ceremony, which is not necessary, nor does it mean that all participants must be husband and wife or lovers. If someone wants to pay homage at the Dragon and Phoenix Temple, as long as both sides are willing and closely related, they can attend.