四六级留学证明通常需要包含以下信息：
1. 证明人的姓名和职位；
2. 证明对象的姓名；
3. 证明对象的学习经历，包括学校名称、学习阶段、入学和毕业日期；
4. 证明对象的成绩和所获得的证书；
5. 证明对象的英语水平，如CET-4或CET-6的考试成绩；
6. 证明对象的留学意向或已获得的留学签证信息；
7. 证明对象的签名和盖章（如果是纸质文档的话）。
```
[学校抬头]
[日期]
To Whom It May Concern,
This is to certify that [学生姓名] has studied at our university from [入学日期] to [毕业日期] majoring in [专业名称]. He/She has completed all the required courses with excellent results and passed the CET-6 examination with a score of [具体分数].
[学生姓名] is a diligent and enthusiastic student who has a good command of English and is well-prepared for further studies abroad. He/She is expected to obtain his/her degree in [专业名称] in [预计毕业日期].
We wish him/her all the best in his/her future educational pursuits.
Sincerely,
[证明人姓名]
[证明人职位]
[学校名称]
[学校盖章]
```
请根据你的具体情况填写相应的信息，并确保所有信息的准确无误。