Billionaire Warren Buffett turned Dalian Dayang Trands Co into China's best-performing clothing stock after saying he wears the company's suits and praising it as "wonderful".

Dayang, based in the northeastern city of Dalian, rose 9.97 percent to 14.67 yuan yesterday in Shanghai. The stock is up 46 percent this week after Dayang posted a video on its website of Buffett congratulating the company and Chairwoman Li Guilian on its 30th anniversary.

"I have to tell you that I now have nine suits all made in China. I threw away the rest of my suits," Berkshire Hathaway Inc's Chairman and CEO Buffett, 79, said in the video, adding that his business partner Charlie Munger and Microsoft Corp Chairman Bill Gates also wear Dayang's outfits.