How difficult is the Datong Cup physics competition?

Competition is tough. Datong Cup Physics Competition is one of the well-known physics competitions in senior high schools in China, which is divided into three stages: preliminary competition, semi-final competition and final competition. The competition is difficult, which requires the participants to have a deep understanding of physical knowledge and high problem-solving ability. Datong Cup Physics Competition is a physics competition with high participation and influence. Its purpose is to encourage and promote the development and innovation of physics and improve students' understanding and interest in physics.