Baidu, the largest search engine in China, may soon face an anti-trust investigation over allegations that it blocked and degraded search query results for a Chinese online encyclopedia website. The complaint was filed by a company that owns the Wikipedia-like site Hudong.com with China's State Administration for Industry and Commerce (SAIC). The complaint requests SAIC to begin an anti-monopoly investigation against Baidu and to fine the search giant 790 million yuan (US$120 million).