On January 7, 2012, Allied Rongda company again satisfactorily completed the 2#450m3 BF shotcrete construction in Pangang Group Xichang New Steel Enterprise CO., LTD. The construction range is the upper of the furnace stack. It took only six hours, with 40 tons of materials. The rebound rate is less than 5%, equipment in normal operation, which reached the expected requirements after shotcrete.