Relationship is about giving and taking; a mutual process. There must be a reciprocal factor in building a bond with business associates. Especially in the line of business, you lose some and you gain some. In a business relationship, you do not just take and take but offer a partnership by giving back something in return. First impressions count in a business relationship, too.

line of business理解成线上商务？in return,in是副词吗？