What's the difference between OEM And ODM? (The most authoritative explanation on the whole network, you don't need to read other articles)

What's the difference between OEM and ODM? Please read this article on alibaba.com, OEM vs ODM manufacturing: What's the difference?

If you don't trust alibaba.com, you have the other choice, 

please read OEM(Original equipment manufacturer) and ODM(Original design manufacturer) on wikipedia.org

Whether you choose OEM or ODM, approving a sample is not the end of the development process. Buyers also need to confirm that the approved quality can be reproduced during bulk production. See this guide to sample and bulk production consistency