On April 8, with the support of Yunnan Feed Industry Association, DadHank( Chengdu) Biotech Corp. hosted the DDC2021 Green Breeding and Safety Production Technology Seminar in Kunming, Yunnan successfully concluded. Yunnan province feed industry association secretary-general Tao Ye, industry veteran nutritionist Xu Zongyun professor, associate professor at sichuan agricultural university ZhuoYong, DDC general manager Li Xiaobin, deputy general manager Bao Qingbin professor, deputy general manager Dr. Lv Jirong，R&D director Dr.Lei Yan and Yunnan feed enterprises on behalf of more than 100 people. Focus  on Environmental protection and safety under the current situation, ruminant nutrition and efficient breeding, alternative measures and ideas of antibiotics, new technologies of nutrition for gilts under the background of ASF and the prohibition of antibiotics make deeply discussion.