I Became Popular in the Entertainment Industry with My Predictions

In his first life, Gu Yan was a doctor in the interstellar world, researching various small weapons for the army. When he was researching small toys, he was accidentally killed by a super quantum weapon. In the second life, he was cultivating immortality in the small world of Xianxia. As a disciple of a small sect, he was hunted down by Jianghu people for selling small weapons. The reason was that he did not inform the buyers of the weapons how to use them, that is, the secondary sales instructions. Yes, Gu Yan was a bastard and succeeded in killing himself... In the third life, after entering the modern era, he discovered that the world and people around him developed in an orderly manner, and he was inexplicably familiar with some things. Later, he discovered that he was in a book he read in the interstellar world. Relying on his own memory, Gu Yan successfully drifted away. Using his invention of small weapons and his memory of the book, he suddenly became popular in the entertainment industry... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.