Introduction to Sun Bin’s Reading Place: Yunmen is Sun Bin’s Reading Place. Legend has it that Gui Guzi set up a reading room here and hid military books behind a stone every day. He read them if he could get in, but listened outside if he couldn't. Because Sun Bin studied military books hard, his food was not sweet and he was as thin as firewood, so he went to study every day. Later, I read the Ten Chapters of the Book of War.