SYDNEY (Reuters) -Australian Prime Minister Anthony Albanese leaves for Shanghai on Saturday on an official visit to China where regional security tensions and efforts to grow economic ties are likely to dominate talks. Australia's exports to China, its largest trading partner, span agriculture and energy but are dominated by iron ore, and Albanese will travel with executives from mining giants Rio Tinto, BHP and Fortescue and hold business events in three cities over six days. "The relationship in China means jobs in Australia, it's as simple as that," Albanese told reporters on Friday.