Information content, based on the concept of useful information for decision-making, is a research method for evaluating the semi-strong-market efficiency. This study selects 103 directional additional events, which were directed by the A-share listed companies of China’s Shanghai Stock Exchange from 2007 to 2008，as the research objects. This research also uses two price testing model (market model and mean adjustment model) to measure the information content on the directional issuance notice, which are directed by Chinese Listed companies. The findings of two test model price indicate that sample companies have the cumulative surplus yield which is significant positive, and directional additional events are seen as “good news” by the market and investors. These events have information content. As a typical non-accounting research on the information content, this paper supports the concept of useful information for decision-making. The results of the empirical research show that the notice of additional directional has information content, regardless of the time window, time point or sub-sectors.