Hi ! It's about 12:50 am. Now I am doing quantum mechanics, in concrete terms, Born approximation of scattering theory with eating pizza ! With eating pizza, yeah ! It is such a fortunate time eating pizza at midnight. I've been participating in statistical mechanics seminar which had finished at 24:00. I'm really tired now, and it is obvious that I can't stop eating pizza. Get fat ? Who knows, who cares ! I love pizza !! I wanna marry pizza ! I have to finish my homework of English, my homework of group theory, and reading the fifth chapter of quantum mechanics before sleep(with eating pizza, of course). So see you soon.