Yuyao Shengtong Manufacturing Co.Ltd This factory is situated in Yu Yao City, which is dubbed the "Plastic City" in China. Yu   Yao has well-developed supply chain for the plastic industry. For example, this small city has several very large plastic material (PVC,   PP,PE) markets; consequently, factories there enjoys very low material price. SS&E has developed long term relationships with   several excellent manufacturers in that area .