科隆股份(300405.SZ)：公司纳米氧化铈项目正在进行项目手续办理，还未投产

Group 1 - The core point of the article is that the company, Kelong Co., Ltd. (300405.SZ), is in the process of handling project procedures for its nano-cerium oxide project, which has not yet commenced production [1] Group 2 - The company has communicated this information through its investor interaction platform [1]