It's in the college back in China. We had this Quantum Mechanics test.
Our teacher is probably one of the best Quantum Physics scientists in China.
He is the leader of Quantum Optics research. We were pretty lucky because
we were told he used to give lectures in English but he did not
use English at that time. Still his lecture material can not be found no
where in the text book. At the end of the semester, he told us
then the level of the exam is Graduate Level. //fear
We had to all haul our as
