Changlongxing Science and Technology (Shenzhen) Co., Ltd. is a company invested by Hong Kong entrepreneurs and Changlongxing Science and Technology (International) Co., Ltd in HongKong is our head office . We have been specializing in researching, developing & producing cast stretch film units for more than thirty years. Our company is located in Shiyan Street office, Baoan district, which is next to the scenic Shiyan Lake, covering an area of nearly twenty thousand square meters, with ...