Forgotten Title MC transmigrates to interstellar era, then goes back to Earth

Please help me find this novel. I'm pretty sure this is a (BL) raw from jjwxc but I just can't remember the title.
According to the description, the MC (for whatever reasons) transmigrates to the interstellar era where he learned (and developed?) countless advanced technologies. Later on, he figured out a way to return to Earth. There, he got awarded for the best scientist(?) award, and the people said he went to the interstellar era for and exchange student program or something.
Sorry for the bad english, and thank you in advance!