Peng Zhang, Yirui Wang, Jialong Ye, Yoking Bai, Le Jiang, Meiyi Wang. “Research on the Construction of the Peach Colony of the Aged under the Background of Beijing-Tianjin-Hebei Cooperation by Blockchain”. Forest Chemicals Review, 1, pp. 515-2, http://forestchemicalsreview.com/index.php/JFCR/article/view/939.