邀请我又拒签我？到底什么鬼？
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Frustrated with a string of unexplained U.S. visa denials, a top Chinese brain scientist has decided to go public, copying numerous journalists on a 17 July email to officials at the U.S.
在经历了一系列莫名其妙而又令人沮丧无比的赴美签证被拒之后，一名中国脑科学家决定把事情公开，在7月17日发给美国官方的电子邮件抄送人里，他复制了一大串美国记者的名字。
Embassy in Beijing pleading his case.
驻北京大使馆负责辩护他的案子。
"Most embassies try to make more friends for their countries; the U.S. embassy is not afraid of offending people and making enemies," says Rao Yi, a high-profile neuroscientist at Peking University in Beijing who studied and worked in the United States for 22 years.
“大部分的大使馆都试图为自己的国家结交更多的朋友；而美国大使馆则不怕得罪人，不怕树敌，”饶毅说道，他是北京的北京大学的一名备受瞩目的神经科学家，曾在美国学习和工作过22年。
His difficulty obtaining a visa is particularly ironic, given that he has been invited to attend a workshop by the U.S. National Science Foundation (NSF), a government agency based in Alexandria, Virginia.
他签证被拒这件事是很有讽刺意味的，因为他是受美国国家自然基金（SNF）之邀，去弗吉利亚的亚历山大市参加一个政府机构的研讨会。
Rao, 56, earned his Ph.D. in neuroscience in 1991 from University of California, San Francisco (UCSF), and did a postdoc at Harvard University.
饶教授，56岁，于1991年在加州大学旧金山分校（UCSF）取得自己的博士学位，然后在哈佛大学做了博士后。
He was on the faculty at Washington University in St. Louis, Missouri for 10 years and later joined Northwestern University's Feinberg School of Medicine in Chicago, Illinois, where he rose to be a full professor.
他曾在密苏里州圣路易市的华盛顿大学担任了十年的讲师，然后加入了伊利诺伊州芝加哥的西北大学范伯格医学院，在那里他升职为正教授。
Along the way, he acquired U.S. citizenship.
同时在这个过程中，他取得了美国公民身份。
He returned to China in 2007 to become dean of Peking University's School of Life Sciences.
2007年时他回到中国成为了北京大学生命科学园的院长。
He later gave up his U.S. citizenship.
后来便放弃了他的美国公民资格。
Rao says he was still regularly traveling to the United States until he was denied a visa to travel to San Francisco for a reunion with his UCSF lab mates in 2016.
饶院长说他仍然频繁渠道美国，直到2016年，他打算去旧金山跟自己加州大学旧金山分校的实验同事们团聚时，却被拒签。
Since then, he has failed to get visas to join a conference at the McGovern Institute for Brain Research at the Massachusetts Institute of Technology in Cambridge, to attend a memorial service for U.S. banker David Rockefeller, and even to visit his daughter, a U.S. citizen.
从那以后，他想去剑桥市的马萨诸塞技术学院的从事脑科学研究的麦戈文研究所开会，以及参加美国银行家大卫.洛克菲勒的追悼会，甚至去看望自己已经取得美国公民资格的女儿时，都被拒签。
In addition to his position at Peking University, he is now director of the Chinese Institute for Brain Research in Beijing.
除了在北大任职外，他现在还是位于北京的中国大脑研究所的所长。
NSF invited him to a workshop in Washington, D.C., on 23 and 24 July that aims to develop a Global Inventory of Brain Initiatives to facilitate international coordination.
美国国家自然基金邀请他参加于7月23日和24日举行第一次研讨会，目的是为了扩充脑科学研究的内容并促进国际协作。
Rao says he had an interview at the U.S. embassy on Monday, during which he was asked to provide an updated CV and travel schedule.
饶院长说他周一在美国大使馆进行了一次面试，期间他们让他提供最新的简历和旅行计划表。
He says he has not made flight reservations because his recent experiences leave him doubtful about getting a visa.
他说他还没有预订机票，因为最近的经历让他怀疑是否能拿到签证。
He says he is puzzled about the visa denials and cannot think of anything he might have done to get blacklisted.
他说对于拒签他感觉非常困惑，也想不出有什么理由会让他上了签证黑名单。
He did appear on Chinese TV criticizing U.S. President Donald Trump after the 2016 election, but his first visa rejection predated the election.
他的确曾在2016年总统大选后，在中国电视上批评过美国总统唐纳德.特朗普，不过他的首次被拒签的时间是在大选之前。
He says he was once told that the decision was made in Washington, D.C., but was given no further details.
他说他曾被告知拒签的决定来自华盛顿方面，不过具体细节不得而知。
The U.S. government began applying tougher restrictions on some Chinese graduate students last month, but the new policy does not apply to senior scientists and does not include the neurosciences.
从上个月开始，美国政府开始对中国研究生入境规定更加严格，不过新政策并不适用于高级科学家，也不包括神经科学。
The U.S. embassy in Beijing does not comment on individual visa cases, a spokesperson wrote in an email to ScienceInsider.
美国驻北京大使馆对个人签证问题不予置评，他们的一名发言人在给《科学内幕》的一封电子邮件中写道。
"I certainly hope that the U.S. will not go down in history as the country which arbitrarily blocks international cooperation in the natural sciences," Rao wrote in his email plea to embassy officials.
“我真心希望美国不会因为主动拒绝自然科学方面的国际合作而留名青史，”饶院长在他写给大使馆官员的邮件中写道。
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