MODESTO, Calif.—UFC star Nick Diaz attended Shen Yun Performing Arts at the Gallo Center for the Arts on Oct. 27. The 38-year-old middleweight enjoyed Shen Yun while healing from his last fight. “It was nice to come here and see the show—it’s really peaceful, has a healing vibe,” he said. He added that he used to see the Nutcracker Suite every year in San Francisco, but found Shen Yun to be a different learning experience. “My grandfather went to the Great Wall of China, and there’s pictures of him there,” Diaz said. “And I always wanted to learn more about that before he passed away. And so I’m trying to learn a lot more about Chinese culture.” Based in New York, Shen Yun brings the best of China’s 5,000 years of civilization to the world stage. Its new theme this year is “China Before Communism,” highlighting the difference between the core of …