Armor Hero: A Useless Nobody From the Start, I Conquered the World

[Not a wish-fulfillment story, and the protagonist isn't invincible. Some settings have been changed.] Overworked office drone Wang Kuanzhai stayed up all night playing Honor of Kings at home. After losing more than ten matches, he suddenly couldn't catch his breath and passed out. When he woke up, he found that he had become extremely old-looking. A voice sounded in his mind: Ding! Welcome to the Armor Hero world. I am your System. Your current identity is Ying Ba, and your goal is to unite the world. Host, begin immediately! The final reward is fantastic, so work hard, Host.