The success of LinkedIn, the United States-based professional networking site, in selling shares to the public is raising questions on when the first comparable Chinese company, operating in the world’s largest Internet market, will follow suit. LinkedIn shares more than doubled during their first day of trading on May 19, and are now trading at around US$65.53, or 45% more than the initial public offering (IPO) price of US$45, which valued the eight-year-old company at $4.3 billion.