Ying (Beijing) Technology Co., Ltd. Was established in April 2018. It was formerly the representative office of Erich Stallkamp ESTA GmbH in China, mainly responsible for market development, product sales, technical consultation and technical services of Erich Stallkamp ESTA GmbH in China. Due to business development needs, it began to operate independently in 2020 and became a domestic-funded enterprise. In addition to close cooperation with Erich Stallkamp ESTA GmbH, it also cooperates with many world-renowned companies such as DORSET from the Netherlands, JOSKIN from Belgium, RECK from Germany, PUMPE from Germany, and TRAMSPREAD from the United Kingdom.

Erich Stallkamp ESTA GmbH is headquartered in Dinklage, Lower Saxony, northern Germany. Founded in 1973, it currently has 230 employees and a production plant of 46, 000 square meters. It is currently the largest and most comprehensive manufacturer of agricultural environmental protection equipment/biomass biogas equipment in Germany, and an "invisible champion" enterprise in the production of environmental protection equipment for animal husbandry. It is especially famous for producing stainless steel fermentation tanks, solid-liquid separators, mixers, pumps and other environmental protection equipment. All of Germany's top 10 biogas engineering companies are its customers, and it also manufactures (OEM) animal husbandry environmental protection equipment for 23 companies around the world.