Today,I met some people from my hometown,who came to our school to participate in reexamination for the postgraduate entrance.Before coming here,they have kept in touch with a postgraduate in grade 2 in our school,who is also from my hometown.After the reexamination ,they were still asking the postgraduate that the mentor (teacher) they had contacted with in advanced will agree them to become his students.In the chat,the postgraduate seemed that he could influence the teacher to select which students will be his postgraduates.The mentor would ask the postgraduate some opinions about hiring which students is better.So if you also want to smoothly pass the postgraduate entrance reexamination in future, it's of a great help for you to knowing some postgraduate or seniors who come from the same college as you.