Hello, dear, I'm glad to answer your question! The second-class score of Jiangsu Mathematics Competition is: the second prize is less than 70 points and greater than or equal to 65 points. More than 75 points in the first prize will enter the final. The first prize is greater than or equal to 70 points, the second prize is less than or equal to 70 points and greater than or equal to 65 points, and the third prize is less than or equal to 65 points.