Why did net profit decrease year-on-year when operating income increased by 40%? Where was the additional expense compared with last year?

Fulin Precision: Hello, the company achieved operating income of 632 million yuan in the third quarter of 2021, an increase of 32.85% over the same period last year, and non-net profit of 76.8557 million yuan, a decrease of 8.55% over the same period last year. The main reasons are the increase in raw material prices and the company's increased investment in research and development of new projects. Thank you for your attention!