“拾到者”means the one who has found the lost thing that the owner of lost property has been looking for.

拾到者means “who picked up /found something someone lost ” for example ，i lost my passport at the airport and broadcasted,"if someone found my passport,pls come to the reception.tks"我在机场丢失了我的护照，我做了广播“请拾到者来服务台，谢谢" here ,拾到者 means the guy who picked up /found my passport

原文应该是：请拾到者送到留学生5号楼302室! 用中文来说就是：有人捡到丢的东西，请送到上文说的地址去，是一则寻物启事 it means that one person who gets something goes to 302 room in NO.5 building it‘s show on one note ,or last and found!

请拾到者送到留学生5号楼302室。 In the word '拾到-者, ' 者/zhě means someone and is an affix like 'or, er' in English. 拾到者 means someone who has already unintentionly picked up the doing.

你说的怎么想是古文呢？拾到者，从字面上的意思是捡到东西的人。