[Stock Index Futures Opening in the Morning Session] The main contract of CSI 300 stock index futures (IF) fell 0.14%, the main contract of SSE 50 stock index futures (IH) rose 0.18%, the main contract of CSI 500 stock index futures (IC) fell 0.48%, and the main contract of CSI 1000 stock index futures (IM) fell 0.53%.