residents was 12963 yuan, an increase of 6.5 per cent. The per capita disposable income of low-income households in cities and towns accounted for 20 per cent of the total households surveyed, up 8.2 per cent, while that in rural areas accounted for 20 per cent of the total households surveyed, accounting for 5553 yuan, an increase of 14.8 per cent. Primary industry In 2017, the planting area of crops in Yangquan City decreased by 1.5 per cent to 55000 hectares. Of this total, grain planting area was 53000 hectares, down 2.5 percent, and oil planting area was 123.5 hectares, an increase of 32.4 percent. Among the grain acreage, the corn acreage was 45000 hectares, down 3.4 per cent. The total grain output for the whole year was 260000 tons, an increase of 0.4 percent. Of this total, corn was 239000 tons, an increase of 0.2 per cent. In 2017, Yangquan's total meat output was 21000 tons, an increase of 5.1 per cent. Of this total, pork production was 16000 tons, up 4.7 per cent; beef production was 400 tons, up 70.2 per cent; and mutton production was 1000 tons, up 17.4 per cent. Milk production was 6000 tons, down 18.2 per cent. Egg production was 33000 tons, down 2.2 per cent. The output of aquatic products was 701 tons, an increase of 12.8 percent. In 2017, Yangquan City completed afforestation area of 3.7 thousand hectares, an increase of 21.1 percent, of which the artificial afforestation area was 3.3 thousand hectares, an increase of 18.8 percent. Barren mountains and wasteland afforested an area of 3.3 thousand hectares. By the end of 2017, the total power of agricultural machinery in Yangquan City was 331000 kilowatts, down 21.5 percent. The area of mechanical cultivated land was 42000 hectares, down 0.7 percent, the mechanical sown area was 44000 hectares, and the mechanical harvest area was 17000 hectares, up 1.1 percent and 0.8 percent respectively over the previous year. The total income of agricultural mechanization in the city reached 210 million yuan, an increase of 5.0 per cent. Secondary industry In 2017, the number of industrial enterprises above the scale of Yangquan reached 123, with an industrial added value of 21.7 billion yuan, an increase of 5.5 percent. The raw coal output of industrial enterprises above scale was 51.326 million tons, an increase of 1.1 per cent. Coal washing was 23.881 million tons, down