It is 5:33 right now, which means I work overnight a second time. It is known to us all that PH.D students who major in chemistry will have little free time once they get into the laboratory. Yes! It is true! How I want to go back to my dormitory and have a good sleep! However, I have to keep up. Just as was said by Prof. Zhenfeng Xi, chemistry equals to "chem is try". People who want to make great progress must keep trying. I have no choice at present for I have set up a goal of going abroad for further study. I look forward to the coming of that day, when I appears in Cambridge, Massachusatts, United States.