《礼记·郊特牲》
成亲的那天，男子亲自到女家迎娶，从女家出来以后，男的要先走一走，女的随后跟着，这表示阳刚阴柔的意思。
男子亲迎，男先于女，刚柔之义也。
On the day of their marriage, the man personally goes to the woman’s house to greet his bride. After coming out from the woman’s house, the man must take the lead in walking, with the woman following behind, which signifies the meaning of strong and yielding.