Where can I buy building mulch film in Haidian, Beijing?

Beijing Haidian Beijing Jingpeng Runhe Agricultural Science and Technology Co., Ltd. sells building mulch films. According to the relevant public information, Beijing Jingpeng Runhe Agricultural Technology Co., Ltd. is located at No.73, Floor 7, New Materials Venture Building, No.7 Fenghui Middle Road, Haidian District, Beijing, and sells building mulch and engineering mulch. Beijing Jingpeng Runhe Agricultural Science and Technology Co., Ltd. is affiliated to Beijing Agricultural Machinery Research Institute. It is one of the successful pilot projects of transforming public institutions into enterprises, and currently has more than 3 national patents.