On April 7, Dean Duan Xiao of the Madison Capital Institute was invited to Beijing to participate in the "Guolin Yunxi Industrial Development Co., Ltd. ("Guolin Group") sponsored by the Northwest China Northeast Shelterbelt Construction Bureau (referred to as the "Three North Bureau"). "Three North Green Ecological Industry Expert Seminar", with more than ten experts and professors from the Chinese Academy of Engineering, Tsinghua University, East China Normal University, South China University of Technology, China Development Institute, Chinese Academy of Sciences and other institutions, as well as many entrepreneur representatives The Green Ecological Fund, the Three North Ecological Cloud, the national reserve forest industry planning, and forest carbon sink trading were discussed.