(Yicai Global) Aug. 1 -- Beijing Worldia Diamond Tools[SHA:688028] surged by the 20 percent daily trading limit today, reaching CNY126 (USD18.26) a share on the Shanghai Stock Exchange's Star Market, a new board currently tracking 25 tech startups.

The firm issued shares at CNY26.68 apiece and they opened at CNY53.89 on July 22, meaning the stock has more than doubled in the nine trading days since.

Editor: James Boynton