China's state secrets law has frequently been criticized for alleged overbreadth. In November 2009, rights activist Huang Qi was sentenced to three years in prison [JURIST report] for violating the state secrets law, when he discussed how some schools collapsed after the Sichuan province earthquake [BBC backgrounder] in 2008 because of shoddy construction. In March four employees of Australian mining company Rio Tinto [corporate website] of receiving bribes and stealing commercial secrets [JURIST report] during stalled iron ore price negotiations, and sentenced to a range of 7 to 14 years in prison. In April the Chinese government revised the state secrets law [JURIST report] to require Internet and telecommunications companies to inform on customers who share state secrets. China began a review of its state secrets law last June, after concerns were raised regarding Internet filtering software [JURIST reports] on computers sold in that country.