Vuvuzelas, the annoying trumpets blown all venues of FIFA 2010 World Cup South Africa, are manufactured by home-based business in China. A vuvuzela sold to nearly ten US dollars in South Africa, only has a cost about 2 Yuan (FYI, 1US$~6.79Yuan at current currency exchange rate).
Photos shown here are mid-aged women working in a family workshop named Jiying Plastic Factory run by Wu Yijun (bottom picture) from Zhejiang Province. Before the opening of World Cup, Wu exported 1 million vuvuzelas to South Africa, with each having a profit margin only 0.1 Yuan, so he did not make too much money. Now he improved its price to 3 Yuan each, in a bid to own more.
Vuvuzela boss: Wu Yijun in front of his laptop