In March 2019, Zoomzu Machinery successfully cooperated with a listed company "Kaishan Group". Kaishan Group was the leader in the foundry industry. It bought a fully automatic molding machine from another manufacturer, but after using it, it was found by another manufacturer. The product quality and molding machine's molding effect can not meet the requirements, and the after-sales service can not keep up, thus delaying the production progress, so I want to repurchase the automatic molding machine, the boss of the Kaishan Group and the purchasing person in charge after a lot of comparison.