Yunma is the core of the audison group, which was created in 2007 with the main business of producing and selling photovoltaic products, planning for photovoltaic engineering, installation and after-sales services. Group operations cover chemical products, photovoltaic batteries, components, e-commerce and other areas, providing diversified products and integrated services to nearly 100 well-known companies worldwide, such as coca-cola, samsung, cp and amazon. Yunma is dedicated to solar single-crystal silicon batteries, component production, marketing, pv system engineering, pv product research and development, technical support, installation and after-sales services for the epc, which can provide diversified and sophisticated products and services to different clients worldwide. Yunma has a world-class professional r & d team of 50 people, including five doctorates and nine masters, and has hired a number of leading expert professors in the photovoltaic industry as technical a...