In sum, whether it be business or daily life, however, they are used widely because reciprocity is the rule that makes people feel good, to feel that we're in the same social relied upon each other.
The conclusion is, whether in daily life or business matter. It has been used widely since the reciprocity rule that makes perfect sense. We feel that people in the same society, it must rely on each other.
The conclusion is that whether it is everyday life or in business. It has been used reciprocity use greatly because of a rule that feels good. I feel that people in the same society also rely on each other.