Our Civilization Crystal

All the boys and girls under the age of 20 in Daxia have obtained an unknown time-travel system. But unexpectedly, this system was analyzed by scientists from the Chinese Academy of Sciences in Daxia. It's just embarrassing Tianxing Nine Songs Plane: Mo Yan: I will be the teacher~ Dyson sphere plane: Chi Yan: I will be the little mouse who steals "lamp oil"~ Naruto plane: Mo Xuan: I will lead everyone to do things! ! ! ...~