我省的水运企业由于受宏观大环境的影响以及长期以来负担过重等原因,一直难以摆脱亏损的阴影,王延虎同志靠改革救活三个亏损企业,他的改革经历说明什么? Because of the macroscopic environment and long-term overburdened, water-carrying enterprises in our province have been struggling to get rid of the shadow of losses. Comrade Wang Yanhu rescued the three loss-making enterprises by reform. What is his reform experience?