Fubao data: electric-carbon spot basis index -1,620 yuan/ton (+290);
battery-grade lithium carbonate 144,950 yuan/ton (-5,000); industrial-grade
lithium carbonate (composite) 142,450 yuan/ton (-5,000); premium battery-grade
145,950 yuan/ton (-5,000); lithium hydroxide index 130,333.33 yuan/ton (-4,500);
metallic lithium index 1,046,250 yuan/ton (-5,000); Fubao brine (lithium
sulfate) discount coefficient 77% (+1 percentage point).