datetime,symbol,open,high,low,close,volume,prev_close
2026-01-05 09:30:00,600000.SH,10.00,10.05,9.98,10.02,100000,9.95
2026-01-05 09:31:00,600000.SH,10.02,10.08,10.01,10.07,120000,9.95
2026-01-05 09:32:00,600000.SH,10.07,10.12,10.06,10.11,110000,9.95
2026-01-05 09:33:00,600000.SH,10.11,10.13,10.05,10.06,130000,9.95
2026-01-06 09:30:00,600000.SH,10.08,10.10,10.00,10.02,150000,10.06
2026-01-06 09:31:00,600000.SH,10.02,10.04,9.96,9.98,140000,10.06