"Aunt Ma looking for a lamb" may refer to a Christian slogan "Ma Yili, looking for a lamb", which means that Christians are looking for people with the same faith, that is, looking for a lamb. This slogan may be posted on campus to help Christians find their faith groups in schools.

However, please note that this is a religious slogan, which may not be easy for non-Christians to understand. In addition, posting such slogans on campus may also cause controversy and doubt.