Rebirth 1980 All-Powerful

I'm reborn in a parallel universe in 1980. Since it's a strange history and world, I won't be polite. Let's see how an unfettered wild horse can harm the simple 1980! But before he let himself go, the protagonist was just a small radio editor who was working abroad and his visa was about to expire. However, there is no system blessing! The protagonist can only climb up step by step. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.