[solskinsglad]

I know that the main difference is the direction, but would it be possible in some situations to use "come" although you are not in the place?

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When I came to China, I didn't speak Chinese, but when I left, I did.

or should it be

When I went to China.....

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When the students come to class in the morning, it's only because they know that learning Enlgish is a good idea - not beacuse they want to study.

or should it be

When the student go to school...........
(said when you are outside of the school)

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What are the rules for the use of come/go?

Thanks.