The China Securities Regulatory Commission issued a warning to two investment bankers from China International Capital Corp. Ltd. for making changes to the sales prospectus of a company they were advising on its listing on China's technology board, South China Morning Post reported May 21.

The regulator said in its microblog on May 21 that it issued the administrative punishment to Wan Jiuqing and Mo Peng after the Shanghai Stock Exchange discovered the case.

In a same-day statement, the Shanghai bourse said the two sponsors from China International Capital altered data and content related to operating data, technology and management analysis in the prospectus of Traffic Control Technology without notifying the exchange, or the company's compliance department, of the changes.

The Shanghai Stock Exchange issued a warning to China International Capital and urged the company to enhance oversight of sponsors.