My Names are Johnson umukoro I am a British citizen, I an only visiting shanghai for business purposes what kind of visa do i need?

If you go for exchanging, a F type should be applied. If for commercial and trade activities, M type is needed.

For the F, you need to prepare your passport, application form with recent taken colored passport photo and invitation letter issued by related entities.
For the M, you needs a invitation letter from your partner in China besides, the passport and the application form with your photo.