SMM Analysis:According to SMM data, as of September 12, the weekly average SMM Zn50 TC stood at 3,850 yuan/mt in metal content, down 50 yuan/mt in metal content from August, while the imported zinc concentrate index reached $98.75/dmt. This marks the end of the 10-month upward trend in domestic zinc concentrate TCs, whereas imported zinc concentrate TCs continued to climb. Why did domestic zinc concentrate TCs suddenly reverse course in September? What are the expectations for Q4.....