C71 This Wasn't an Italian Cannon
As a matter of fact, when Lin Xin was' farming 'in Orcus Labyrinth, he had done many experiments on the upgrading mechanism of Hero Unit.
During that process, he found that even if a hero was not summoned to the modern world by him, they could still obtain a certain amount of experience when hunting monsters in other military units.
With this as the premise
