Chun Yu is the only one fastener manufacturer in Taiwan who owns acid treatment system which commenced in 1996. With acquisition of Environmental Protection Administration License of waste hydrochloric acid treatment has helped acid recycle problems in regional fastener business. This system recycles the waste acid from annealing and pickling process with a 99% recycling rate which enables the continuous usage of resources.

In 1990, Chun Yu established the wastewater treatment facility where regenerates the wastewater by a serious of oxidation-reduction reaction. With this establishment that allow us effectively minimize pollution problems around the environment we live in.