On Tuesday, the commission opened official micro blogs on four large websites, including the most popular, Sina Weibo and Tencent Weibo, the Chinese Twitter-like micro-blogging services.

The number of "followers" of the official commission accounts on the relatively new form of social media is booming. On Sina Weibo alone, more than 100,000 followers were attracted in one day.

The commission posts every day's stock market transaction data, clarifies market rumors as soon as possible and runs a complaints channel so investors can protect their legal rights on the official commission Weibo site.

Almost 1,000 readers have left comments under each message on the website.

Many comments have poured in about the poor performance of the stock market. Others have called for measures to curb manipulation and stimulate the market.

Li Daxiao, head of the research department at Yingda Securities Co, said the social media platform will help the commission sustain a stable market.

"It has shown a more open and transparent attitude toward supervision of the institution, which can improve communications between regulators and investors," Li said.

Because of a more convenient case-reporting system, the commission received an increasing number of claims about violations in the securities market. In September, the commission started investigations into 39 cases, which was 15 times the total number in the first eight months of the year, said a commission spokesman.