I ha ha second-hand treasure

I ha ershou bao, a second-hand information release platform for college students.

(Note: "哈" in this context seems to be a casual or playful way of saying "have" or indicating possession, but it might also be a typo or slang. Depending on the intended meaning, a more polished translation could be:)

I have a second-hand information release platform for college students called Ers Hou Bao.