1　The impact of the domestic economic environment
During the "Thirteenth Five-Year Plan" period, the internal environment facing the development of the coal industry has become more complicated. From the perspective of the domestic market, China’s economic development has entered a new normal, shifting from high-speed growth to medium-high-speed growth, and evolving to a stage with a more advanced form, a more optimized division of labor, and a more reasonable structure. The energy revolution accelerates, oil and gas replace coal, and non-fossil energy replace fossils. The pace of dual energy replacement is accelerating, the ecological environment has been continuously strengthened, and the coal industry’s requirements for quality and efficiency improvement, transformation and upgrading have become more urgent. The development of the coal industry is facing a historic turning point; from the perspective of relevant national policies, as the country’s 13th Five-Year Plan "The plan was promulgated, and some industries have been continuously adjusted, especially the adjustment of steel, chemical, electric power and other industries. In recent years, the country’s requirements for energy conservation and environmental protection and control have become more stringent, providing for the upstream industry’s coal washing and processing industries. An environment where opportunities and risks coexist.

2　The impact of the domestic coal market
Since 2012, the coal market has continued to decline, the profitability of coal companies has deteriorated year by year, and the investment enthusiasm of the coal industry has dropped sharply. In 2015, the contradiction of oversupply in the coal market was still prominent, coal prices continued to decline, and the efficiency of coal enterprises fell sharply. In 2016, the coal market was affected by the national overcapacity policy, and the supply exceeded demand in a short period of time. The price of coal maintained a relatively large growth despite the return of rationality. Until the second half of 2016, the price of coal rose sharply, which helped the market get rid of the old downturn. In order to gain profitability, although the whole industry is still in a state of loss, the situation has improved significantly and the loss-making area has decreased. Large coal companies have turned losses into profits that year. In 2017, with the gradual recovery of the coal market, my country's coal enterprises have gradually turned losses into profits. According to data released by the National Bureau of Statistics, from 2016 to 2017, my country's coal mining and washing industry achieved total profits of 109.09 billion yuan and 295.93 billion yuan, a year-on-year increase of 223.6% and 290.5%.

Looking forward to the next few years, coal demand will continue to rise while energy consumption elasticity is restored, and the supply and demand gap will be further enlarged. It is expected that coal prices will continue to rise, and the coal market will usher in new opportunities for cyclical prosperity. This is still a good environment for the development of my country's coal industry.

3　The impact of national coal policy
At the end of December 2016, with the promulgation of the 13th Five-Year Plan for the development of the national coal industry, relevant plans and adjustments were made to the development of China’s coal washing industry, and it was proposed that large and medium-sized coal mines should be equipped with coal preparation plants or central processing plants. Coal plants accelerate the upgrading of existing coal preparation facilities in coal mines, increase the selection rate of raw coal, and combine China’s coal preparation status in recent years (see Table 1), and propose that by 2020, China’s raw coal selection capacity will reach 3.2 billion tons. The selection rate has reached the goal of 75%. Based on the current development status of coal preparation technology and equipment in China, it is proposed to actively promote the research and development and application of advanced 10 million-ton level washing technology and equipment, reduce energy consumption, medium consumption and pollutant emissions in the washing process, and vigorously develop high-precision coal Washing and processing, especially the application and promotion of dry coal preparation technology, to achieve deep coal quality improvement and quality classification. At the same time, it is proposed to encourage the construction of underground coal preparation plant demonstration projects, develop underground gangue discharge technology, and support the development of professional operation and maintenance of coal preparation plants, improve the overall efficiency of coal preparation plants, and reduce operating costs. All these have pointed out the direction for the development of my country's coal preparation industry, and also provided guidance for the development of my country's related coal washing equipment.