The Opening Brain in a Vat

Chen Shuo went to the United States to visit his girlfriend Shen Xingyu. He accidentally got into a car accident. When he woke up, he found that he had become a literal brain in a vat, and in the vat next to him was his girlfriend... Fortunately, he awakened the random time travel system. During his first time travel, he became Yun Tianming in "The Three-Body Problem"... How will he save himself and his girlfriend...