Difficult. The test questions of the Yangtze Cup Math Competition cover a wide range and are difficult. It not only requires candidates to have solid basic knowledge, but also requires certain expansion and innovative thinking. Some test questions require certain ability of reverse thinking and mathematical modeling, so it is difficult to test the comprehensive quality and problem-solving ability of the contestants. The Yangtze Cup Mathematics Competition is one of the most important subject competitions in China. Sponsored by China Children's Mathematics Education Research Association, it is held every year for primary and secondary school students all over the country.