TRADE relations between Western Australia and China have been boosted by this week’s announcement by BHP Billiton of a 25-year $11.6 billion ($US9 billion) deal with four of China’s largest steel producers.

TRADE relations between Western Australia and China have been boosted by this week’s announcement by BHP Billiton of a 25-year $11.6 billion ($US9 billion) deal with four of China’s largest steel producers.