景兴纸业：公司的包装原纸主要客户是下游的纸箱纸板企业

Group 1 - The core viewpoint of the article highlights that Jingxing Paper's main customers for packaging paper are downstream carton and cardboard enterprises [1] - The company's wholly-owned subsidiary, Pinghu Jingxing Packaging Materials Co., Ltd., primarily produces cartons and cardboard [1] - E-commerce companies, particularly express delivery firms, are significant customers for the company [1]