The trial of Tian Wenhua, of a large dairy company in China, for failing to monitor the safety of baby milk powder, and covering up knowledge that dairy products contained impermissible amounts of melamine. The problem of milk powder tainted by addition of melamine chemical to watered down product to falsely raise protein count has been found to be widespread in China. About 300,000 children were sickened by the formula leading to 6 deaths. Tian and three other Sanlu executives are on trial. Tian says she knew about the contaminated milk powder in May 2008 but did not alert officials till August. By that time Sanlu had made 900 tons of the contaminated powder. Executives at Fonterra Group of New Zealand, which owns a large stake in Sanlu, came to know of the problem and insisted Sanlu make a recall. China's effort to bring western companies like Smithfield Foods to enter China's pork industry is part of the effort to build safety and credibility into food products sold in China.