Last week, I planned to pay a visit my grandparents. They were so exciting to hear the news because we have not seen each other for a long time. But my best friend invited I to take part in his birthday party and share his happinesses. When I thought of a promise that I had made it, I found it hard to make a decision. Eventually I chose to refusing my friend's invitation. Seeing my grandparents’ smile and the deliciously food they cooked for me, I knew 1 did something correct. We must keep our promise, and we will lose trust from others.