I show my appreciation towards people who are kind or helpful to me in two ways. First, indirect expression of appreciation. If I show my gratitude directly, there are people who are burdened, so I don't say it directly, but show my heart indirectly. For example, they do their hard work for them or take their requests first. Second, it's a direct expression of appreciation, as opposed to the first way. If I show my gratitude indirectly, I show my feelings directly because there are people who don't know well. For example, I can say thank you and write a note directly of write a letter and deliver it to them with a gift that is not burdensome.