Buffett Tapes a Testimonial for Ms. Li; President Hu's Wardrobe in the Closet America's foremost capitalist may not have much in common with China's top Communist, but Warren Buffett and Hu Jintao do appear to share the same clothier. Move over Brioni, the truly rich and powerful are wearing Trands. The obscure menswear label is produced by Dayang Group, a clothing company founded by Li Guilian, 63 years old, a diminutive farmer-turned-fashion mogul, in northeast China. Ms. Li's company got a major boost after Mr. Buffett, chairman and chief executive of Berkshire Hathaway Inc., recently appeared in a Dayang promotional...