Alibaba and Made-in-China are saturated with trading companies reselling other factories' goods. To reach the actual producer, read company websites — not marketplace listings.
Find the factory, not the trader
Real factories describe their production lines, capacity, certifications and product range on their own domain. Search in English and the local language, read each site, and keep only the ones whose pages clearly describe manufacturing.
Fiorentis does this automatically and filters out marketplaces and traders — from $9, once.