felixcat评注：现在很多大学生都知道：想去美国的话，可以申请美国大学的博士生计划，从而拿到美国签证。申请博士计划的原因是美国大学的观念是博士生才能保证有奖学金，美国的学费和生活费比较贵，一般国内家庭是负担不起的。
但有相当一部分的学生在申请时候心里的本意不是想去美国念书，而是借学生签证这个跳板来实现进入美国的目的。所以这部分人的典型行动便是：在美国随便拿一个政府承认的学位（比如说不需要写毕业论文只要上课就可以的工程硕士之类的学位），就跟系里反悔说不想读博士了，要退出学习，同时马上找一个工作（的确这段时间工作比较好找），立马把学生签证转成工作签证，然后申请绿卡留在美国。
所以这就很伤中国学生的信誉。因为当初教授招收他们来的原因是他们的申请书上诚恳地写着想要念博士，搞科研，教授相信了才把他们招来的，但是来了之后一两年就变脸了。教授都是聪明人，一下子就明白了实际上被人利用了。所以有的教授一怒之下干脆不招中国学生，把这条“变相移民美国”的路堵死。因此，最终的实际效果便是中国人自己害了中国人。
我自己觉得：做人的基本原则是要说到做到，讲诚信。这个曾经是中华民族的传统美德，现在似乎有点沦丧了。
一下转贴的是网友公布出来的信件（原文太长，我摘取了前面几段）
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http://www.mitbbs.com/article_t/JobHunting/18701088.html
发信人: smallrock (小石头), 信区: JobHunting
标 题: 密歇根大学工程系拒收中国学生了
发信站: BBS 未名空间站 (Mon Apr 2 10:35:14 2007)
letter from a professor majored in ME,U OF MICHIGAN,US
Dear xxx:
I would like to inform you of the situation relevant to Chinese graduate students here, at least at our department, which makes it very difficult for us to accept graduate students from China in the future.
Over about one year period, we have had 6 Chinese Ph.D. students quit their RAship and Ph.D. studies. The reason for them to leave was not that they could not continue, it was rather because they want to have a job now (a higher salary, with a hope that the companies will apply for their green card status). They came with thier promises to pursue their Ph.D. degrees, we paid tuition for them to take courses for their Master degree, and we taught and helped them in their research capabilities. Once they got their M.S. degree in Mechanical Engeering, because of the excellent job market in the U.S. at this time, it is relatively easy for them to find a job. In a way we felt that we were used as a step for those Chinese students to come here, and get their master's degree, then get their jobs. We pay approximately $45-50 K/year for each Ph.D. student, including the tuition, health insurance, various fees, lab and computer fees, and monthly salary, we also put a lot of time and efforts for them. They (most of them) also did good research work as assistants. However, we don't get credit because we don't produce PH.D's, which is one of our major purposes as an institution of high education. On the other hand, they have their particular interests which are also understandable, for example, financial pressure, and wishes to have their green card applications on the way asap.
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