Xi'an Aircraft International Corp., a Chinese maker of plane parts, said first-half profit more than doubled after sales surged fourfold.

Net income climbed to 138 million yuan ($20 million), or 0.1249 yuan a share, from 56.1 million yuan, or 0.0896 yuan a share, a year earlier, the Xi'an, northwest China-based company said in a statement to Shenzhen Stock Exchange today. Sales jumped to 4.2 billion yuan from 1 billion yuan.

The company also said profit may rise as much as 250 percent in the first nine months of the year, from 70.6 million yuan a year earlier, with third-quarter earnings likely increasing sevenfold.

Xi'an Aircraft shares rose 2.1 percent to 17.30 yuan in Shenzhen yesterday. The stock has dropped 53 percent this year, compared with the benchmark CSI 300 Index's 49 percent decline.