自美国物理学家O.M.Bilanuik和E.C.Sudarshan（1962年）以及G.Feinberg（1967年）的开创性工作以来，在美国、欧洲和中国都对超光速展开了研究。根据A.Einstein于1905年发表的原始论文，超光速没有存在的可能，但其1907年的论文对“信号传播不能超光速”却不很肯定。文章把速度问题分解为若干类、项，并提出“广义信息速度”定义以利于对众多速度概念的讨论。在反思了40年来（1962—2003年）的超光速研究以后，得出结论认为“超过真空中光速c”是一种可实现的科学陈述。

Work on faster-than-light (superluminal) research has been going on in USA, Europe and PRC since the early work of O. M. Bilanuik and E. C. Sudarshan in 1962 and that of a good working with G. Feinberg at Columbia University in 1967.

According to the original article of A. Einstein in 1905, velocities greater than that of light have no possibility of existence. However, an interesting phenomenon related to the Einstein's article in 1907 have been found, in which the possibility of sending signals in superluminal communication was not completely negated. In this paper, the author tries to bring about split-up to the different subjects of velocity's study，and then, suggests the definition of General Information Velocity (GIV) to make better discussion of those velocity concepts. After rethinking superluminal research in 1962—2003，the author obtains the conclusion that the “faster than the speed of light in vacuum” is a realizable scientific statement.