Australia and China signed commercial agreements on Monday worth more than A$10 billion ($8.73 billion), mostly covering mining and energy-related projects and including funding for projects already announced.

The formal signings were witnessed by visiting Chinese Vice-President Xi Jinping, regarded as heir apparent to China's President Hu Jintao. Xi is on a four day visit to Australia with a large delegation of business executives and officials.

(Reporting by Mark Bendeich; Editing by Ed Davies)