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Polite sentences

Polite sentences

Hi,
I am trying to write a text about some work I have done and in that text I am asking my colleagues to contribute for this idea of mine. I am just confused which one is the correct and the polite way of asking.

the sentence is like this

1. No idea works without contribution, so we need your contribution.
2. No idea works without contribution, so we request you to contribute to make the learning experience better and interactive.

Please tell me which is more polite?