Don't worry about it. It's a taken of my appreciation for your business, and friendship.
没关系的。这是向你表示我们在生意及友谊上的一点心意。
As its composition and line reminded him of an Italian painting he knew well, he decided to buy it.
画面构图与纸条使他想起一幅他所熟悉的意大利画,于是他决定将画买了下来。