Four employees of mining giant Rio Tinto stood trial in China on Monday, while the company's chief executive said in Beijing that Rio remained committed to working with the key Asian customer.

Australian national Stern Hu and three Chinese employees of Rio faced prosecutors in the court in Shanghai, China's financial hub, all accused of taking bribes and violating commercial secrets.

Hu pleaded guilty to taking bribes worth some 6 million yuan ($879,000), Bloomberg reported, citing Tao Wuping, the lawyer for another defendant.

The case has highlighted the risks of doing business in a country with a huge market but close ties between the ruling Communist Party, police and courts.

While the trial got underway in a concrete building near an elevated highway in Shanghai, Rio chief executive Tom Albanese signaled to an audience in the Chinese capital that he did not want to jeopardize business ties with China, the world's biggest consumer of iron ore.

This issue is obviously of great concern to us, Albanese told a forum of officials and executives, referring to the case.

I can only say we respectfully await the outcome of the Chinese legal process, he told the forum, held in an exclusive state guesthouse.

Albanese said we remain committed to strengthening our relationship with China, not just because you are our biggest customer, but because we see long-term business advantages for both of us.

Foreign reporters were not allowed to attend the forum, and Rio emailed copies of Albanese's speech. A Chinese webcast of it did not include his comments on the trial.

The four employees from Rio's iron ore team, including Hu, were detained last summer at the height of fraught negotiations over 2009 ore prices, creating a furor over China's opaque state secrets laws.

Chinese media last summer accused the four of seeking information about Chinese mines and steel mills, which many firms consider legitimate market information.

Rio has said that its employees did nothing wrong.

Shanghai is likely to want the case over quickly, before its much ballyhooed 2010 World Expo opens in Shanghai in May.

Foreign reporters were not allowed to attend the trial.

China has excluded Australian diplomats from observing the part of the trial concerning commercial secrets, drawing protests from Canberra, which says they have the right to be present for the whole trial, scheduled to last three days.

Before entering the court, Australia's Consul-General in Shanghai, Tom Connor, told a crush of reporters he would make a statement after the day's proceedings.


A Chinese researcher in a think-tank run by the nation's Ministry of Commerce said there was a strong case against the Rio employees and warned Australia to keep a distance.

The Australian government and public need to calmly and rationally consider this question: should the government waste such a large amount of political and financial resources to pay the bill for certain companies' immature and even illegal ways? the researcher, Mei Xinyu, wrote in the Chinese-language Shanghai Securities News.

What Rio Tinto and Stern Hu did would be utterly taboo in any host country, wrote Mei.

The trial opened on the same day that, according to one Chinese news report, Internet giant Google may announce whether it will pull out of China over its complaints about censorship and hacking.

Mindful of the international attention paid to the Rio case, China has stuck strictly to its own legal deadlines for moving the case from police to the court system.

(Additional reporting by Tom Miles and David Stanway in Beijing; Writing by Chris Buckley; Editing by Ken Wills and Jerry Norton)