北京君正(300223.SZ)：3D NAND已有产品销售，目前部分产品在研发中

Group 1 - The core viewpoint of the article is that Beijing Junzheng (300223.SZ) has already begun sales of 3D NAND products, with some products currently under development [1] Group 2 - The company is actively engaging with investors through an interactive platform to provide updates on its product offerings [1]