What does "seeking business" mean in Japanese? Does my other colleague always call me "Qiu Shang" and scold me?

In Japanese, Zhang's pronunciation is "Joe", while "Sang" is a kind of honorific title, usually followed by a person's name. He calls you Xiao Zhang or Lao Zhang in Japanese, which is very kind. It would be a bit rude if he called you Joe directly. Don't worry, I'm not scolding you or satirizing you.