Dongguan Zhongyan Machinery Equipment Co., Ltd. (hereinafter referred to as "JOHNY") was established in 2012. It is a company specializing in the research, development, and production of single-sided grinding and polishing machines, double-sided grinding and polishing machines, flipping machines, and other machinery. Its research and development products are mainly used for ultra-high precision grinding and polishing of materials such as mobile phone glass, mobile phone cases, sapphire, ceramics, stainless steel metals, and non-metals.

JOHNY provides customers with a comprehensive solution for professional high-precision ultra-high mirror surface grinding production systems. This includes single-sided and double-sided grinding and polishing machines, various grinding discs, grinding pads, grinding fluids, as well as the supporting production processes.