Civil servant owns more than 10,000 bottle caps, wants to hold exhibition

Most people wouldn't think twice about discarding an old bottle cap once it has served its purpose, but for Sun Yang these small metal curios have become an obsession.

The 32-year-old civil servant from Harbin, Heilongjiang province, has collected more than 10,000 bottle caps over the past six years, including 4,500 from domestic beer brands, 4,000 from foreign beer brands and more than 2,000 from other beverages.