Core Viewpoint - Yongshan Lithium Industry (603399.SH) primarily engages in the production and sales of lithium carbonate and lithium hydroxide, with phosphate iron lithium materials and ternary lithium materials being its downstream customers [1] Group 1 - The main business of the company is the production and sales of lithium carbonate and lithium hydroxide [1] - Phosphate iron lithium materials and ternary lithium materials are identified as downstream customers of the company [1]