I can't. 12345 is the mayor's hotline, so it can't be used to find people, so you can't call if you can't find anyone in the university teachers' files. 12345, you can look it up directly in the archives of your alma mater. 12345 government service convenience hotline (hereinafter referred to as 12345 hotline) refers to the public service platform established by local municipal people's governments, which consists of telephone 12345, mayor's mailbox, SMS, mobile phone client, Weibo, WeChat, etc. , and specializes in accepting hotline matters.