The strongest professional mentor

When Jiang Chang woke up, he found that there was an extra system panel in his mind, and he became an NPC in the "game world"!But, why is he a weak, scumbag that everyone can bully, who can't even beat a little girl?
Wait, there are invincible talents, god-level skills, super artifacts and infinite space backpacks in my system panel?Or is it an NPC with a hidden identity, who can issue unlimited missions to let the so-called "players" do things for him?Can there be countless hidden jobs for players to change jobs?Well, that's about the same, become stronger from now on, it's time to show your real skills!

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