What's the grading system in China?

中国的等级制度是什么？

What sort of grading system is used?

使用什么样的评分等级?。

We have a grading system to evaluate your work.

我们有一个等级体系来评定你的工作。

Could you please talk about the grading system?

请您介绍一下评分标准可以吗？

French wine grading system is the most rigorous.

法国的葡萄酒分级制度是最严谨的。