I should do research, need downloads clinch a deal with what the year before last year spends valence (all valence or closing quotation price) data, had better be EXECL format, that ace gives directions.

• 我要做研究，需要下载个股以前年度的成交价（均价或收盘价）数据，最好是EXECL格式的，那位高手指点一下。