Baidu, China's largest internet search engine, looks set to face a wave of legal challenges as a group of lawyers is organising a mass complaint against the company's business practices.

Led by Li Changqing, who filed the first complaint under China's new anti-monopoly law against Baidu in October, the group said it had enlisted more than 50 companies that were willing to sue Baidu, and the mass complaint would be filed once the number had risen to 100.