The contact of human beings with the advanced intellectual beings in the outer on over 100，000years ago.Many humanoid beings from the outer space have set up many scientific labs and aviation bases in which dozens of scientists from the earth are working now.This can be proved without any dispute by so many facts throughout the ages.

在同外星高級智能生物的第四類接觸中，地球人如夢方醒：原來，月球并非地球的天然衛星，它是10多萬年前地外文明建造的一個人造天體，許多來自地外文明的類人生物早已在月球上建起科學實驗室和航天基地，地球上的幾十名科學家正在其中的某些實驗室里工作，古往今來的大量事實已無可辯駁地證明了這一點。