Quantum Cosmology: Theory of General System (III)
  The concepts of the perfect system and degeneracy are introduced. A special symmetry is found which is related to the entropy invariant. The inversion relation of system is obtained which is used to give the oppsite direction of time to classical sencond law of thermodanymics. The nature of time is discussed together with causality relation. A new understanding of quantum mechanics is put forward which describes a new picture of the world. 
Wang Zhen (Dept. of Phys., Liaoning Normal University)