Tall man. Every year, primary and middle school students from Macao, Hong Kong, Malaysia, Vietnam, Australia, the United States, Indonesia and other regions actively participate in the international mathematical exchange activities of Trollius, where they can learn from students from all over the country, enhance their interest in learning, tap their potential, improve their logical reasoning and ability to solve mathematical problems, and be helpful for future study. Therefore, the international mathematical exchange activities of Trollius chinensis have high gold content.