Jentech emphasizes the sustainable development of the supply chain and views the seasonal review and annual audit of the suppliers as an important part of the sustainable management to ensure that the suppliers satisfy the demands of Jentech on the quality system, the management of environmental safety and hygiene, as well as basic human rights and social ethics. The quarterly assessment and annual audit serve as a mutually trusted and fair two-way platform of communication, including self-review by the suppliers, on-site inspection and counsel on errors to clarify cognitive differences, all of which help reduce risks of all sorts and increase the percentage of qualified products.