推荐回答（4个）
X字签证：发给来中国留学、进修、实习6个月以上的人员； F字签证：发给应邀来中国访问、考察、讲学、经商、进行科技文化交流及短期进修、实习等活动不超过6个月的人员；
我们学校的学习签证中文课程是拥有正规的许可的，我们将发送邀请函和录取通知书给外籍人士办理签证的时候进行提交。
外籍人士如若是工作则不允许申请X类签证，但是兼职和校外的实习签证可以在不久的将来被许可。你应该联系你的大学或者是公司看他们是否能够为你安排。暂住证可以用180天的有效期签发5年。X2签证持有人的存续期间内留在中国的表示，这是没有必要为他们办理暂住证。
X字签证：发给来中国留学、进修、实习6个月以上的人员； F字签证：发给应邀来中国访问、考察、讲学、经商、进行科技文化交流及短期进修、实习等活动不超过6个月的人员；
邀请函像正常的信函格式一样，内容按照实际情况写就可以了，不过要用带公司名址的正式文件,要有公司法人代表的签名，格式如下：15th October,
2014（时间）Karen Lew（被邀请人姓名）1521 Its RdRated QLD
4106（被邀请人通信地址）Dear Karen （以下是正文了，说明邀请原因及大概的到访、停留、离开时间）PPS
Dalian, China would like to invite you to visit our manufacturing plant in
October for business meeting.We would be obliged if you could arrive
around the 18th October and be available for approximately 7 days, departing on
25th, October, 2007.I look forward to catching up with you on your
arrival to China.Kind regard,Zhang Xiaoniu General
Manager, PPS Hi-Tech Co., Ltd.
按照最新政策是 S2 短期180.天内的 加注实习2字
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