Beijing Chang Yin You Technical Development co.,ltd is a perfect example of the fusion between the mature experience of our workforce and innovative technologies concerning machinery involved in the p...

We take pride in our potential to deliver DJ Equipment with quality standards that our clients demand for. professional loudspeaker,pro-audio equipment,karaoke/DJ equipment,stage monitor,woofer produc...

Beijing Chang yinyou Technology development co.,Ltd(original Beijng Digital Audiovisual Technical Center),founded in the year of 1997.We have been pursuing preeminent quality and surpassing ourself wi...