撰写一封正式且具有个人色彩的留学生邀请函，可以按照以下步骤进行：

明确邀请目的

确定你邀请对方的原因，比如是为了探亲访友、商务考察、商务洽谈或是文化交流等。

收集必要信息

被邀请人的全名、护照号码、出生日期等基本信息。

被邀请人的职业或学校信息。

预计的访问日期和停留期限。

访问期间的住宿安排。

访问期间的费用承担情况（如奖学金、赞助等）。

撰写邀请函正文

开头用正式的问候语，如“Dear Mr./Ms. [Last Name]”。

简短介绍自己，并说明写信的目的，即邀请对方来访。

详细说明访问的具体安排，包括住宿、交通等。

阐述访问期间的期望和目的，以及对方来访对你的重要性。

提及任何相关的费用安排，如奖学金、赞助等。

结尾处用正式的结束语，如“Sincerely”或“Best regards”，并签上自己的名字。

使用正式信函格式

信函应使用标准的商务信函格式，包括日期、收信人地址、发信人地址等。

信函应保持简洁明了，避免冗长的叙述。

校对和修改

仔细校对信函，确保没有语法或拼写错误。

确保所有信息准确无误。

发送邀请函

可以通过电子邮件或邮寄方式发送邀请函。

如果通过电子邮件发送，确保邮件主题清晰明了，如“Invitation to Visit as an International Student”。

```

[Your Full Name]

[Your University/Institution]

[Your Address]

[City, State, Zip Code]

[Email Address]

[Phone Number]

[Date]

Dear [Recipient's Full Name],

I am writing to extend a formal invitation for you to visit me at [Your University/Institution] as an international student. I am currently enrolled in the [Your Major/Field of Study] program and I believe your visit would be beneficial for both of us.

The purpose of your visit is [specify the purpose, e.g., to explore academic opportunities, to strengthen our professional relationship, to experience Canadian culture, etc.]. During your stay, you will have the opportunity to stay with me at my dormitory address [Your Address]. I will ensure that all necessary arrangements are made for your comfort and convenience.

The visit is scheduled to take place from [Start Date] to [End Date], during which you will have the opportunity to participate in various activities and events hosted by the university. I am confident that your presence will enrich my academic and personal experience.

Regarding expenses, I have been awarded a scholarship that will cover my tuition and living expenses during your visit. Any additional costs will be my responsibility. I am also willing to explore other funding opportunities if necessary.

I sincerely hope you will be able to accept my invitation and look forward to the possibility of welcoming you to [Your University/Institution]. Please let me know if you have any questions or require further information.

Sincerely,

[Your Full Name]

```

请根据实际情况调整上述模板中的内容，以确保邀请函符合你的具体需求。