Twenty-eight small and medium-sized enterprises Friday started trading their shares at China's NASDAQ-style market, ChiNext, in Shenzhen, Guangdong province.

Representatives of the first batch of 28 selected firms for China's ChiNext pose for photos during the listing ceremony in Shenzhen, Oct 30, 2009.

Huayi Brothers Media Corp, a movie producer, soared the most, up 122.74 percent from its IPO price, to open at 63.66 yuan per share.

Zhongyuan Huadian Co Ltd increased the least by 46.26 percent from its IPO price to open at 47 yuan per share.

ChiNext was expected to provide more fund-raising channels for small and medium-sized businesses of high technology and high growth.

The central bank and the whole financial system will consistently support ChiNext, said Zhou Xiaochuan, governor of the People's Bank of China, the central bank, at the trade opening ceremony.

The index screen shows the increase of the opening prices of the first batch of 28 selected firms for China's ChiNext after their debut in Shenzhen, Oct 30, 2009.