After careful investigation by the marketing department and a large number of experiments by the R & D team, for areas with annual average temperature below 10 ℃ in the north of the Yellow River, especially in Northwest China, corresponding cold impact upgrading products are being developed to meet the requirements. 

    From the standpoint of being responsible for the industry and "Zhizheng", the upgraded "Zhizheng" products continue to implement Zhizheng PVC board standard. Zhizheng PVC board standard is the standard that Zhizheng believes should be the first choice for the animal husbandry industry. This is the professional suggestion of Zhizheng engaged in PVC extrusion for more than 20 years, which is proved by the historical case of more than ten years of application of Zhizheng products in the animal husbandry industry.