Useful. Yu, a famous expert in brain science, the chief lecturer of Six Hats Thinking Asia, and an expert in brain science and psychology. Member of the World Brain Sports Committee, member of the Organizing Committee of the 19th World Memory Championship, chief lecturer of the "World Memory Masters" lecturer group, chief researcher of Mu holistic thinking education, and founder and chairman of Mu Education Group. Successfully instructed students to recite a 265-page Tang and Song poetry in 5 days, a 365-page English vocabulary for postgraduate entrance examination in 10 days, English vocabulary for three years in middle school in 6 days, English vocabulary for six years in primary school in 5 days, and Tao Te Ching in 6 days. Train athletes to participate in the World Memory Championship and win the title of "World Memory Master" and "Single World Runner-up" in the 20th World Memory Championship.