How to choose a cosmetic OEM processing factory?

From the perspective of R&D capabilities, a good cosmetic OEM agency must have good R&D capabilities, which means that without R&D capabilities, product quality cannot be guaranteed. So, how to distinguish R&D capabilities, you need to check the R&D team and R&D configuration. Please confirm whether the factory has its own laboratory, what is the composition of R&D personnel, and whether the R&D equipment used is advanced.