able, his pencil swinging back and forth: "Theoretically speaking, space and time are two dimensions, and they cannot be converted into each other. It's like we can't say that one hour equals 5 kilome...In May of 884 AD, on the official road fifty li southwest of Bianzhou (modern-day Kaifeng)ts personality was quite amiable. 。He watched a young attendant rush in, and immediately stopped him, asking what he wanted.Ye Youxiao hurriedly explained his background and the reason for wanting to...