中航重机：上半年净利润4.92亿元

Group 1 - The core point of the article is that AVIC Heavy Machinery (600765.SH) reported a decline in both revenue and net profit for the first half of the year [1] Group 2 - The company's operating revenue for the first half of the year was 5.751 billion yuan, representing a year-on-year decrease of 4.51% [1] - The net profit for the same period was 492 million yuan, showing a year-on-year decline of 32.59% [1]