On the wedding day, the bride serves tea (holding the teacup with both hands) to her parents at home before the groom arrives. She does this out of respect and to thank her parents for raising her. 

Traditionally, there is a Chinese Wedding Tea Ceremony  before wedding dinner. The wedding couple serve tea in order, starting with the groom’s parents then proceeding from the oldest family members,  like his oldest uncles and aunts, and all the way to his older brother, e.g. 

The general rule is to have the woman on the left side and the man on the right side. The people being served will sit in chairs, while the bride and groom kneel. .

In return, the  wedding couple will receive lucky red envelopes stuffed with money or jewelry. These envelopes are placed on the platter which holds the teacups.