Gold mining field in Queensland. The gold purity rate per ton is 17 grams. Besides gold, there are silver and brass also. The profit per year will be around 5 million AUD, daily production will be 40 tons. Mining time limit is 10-15 year. The whole mining equipment is ready to use. If the investor is willing to invest 1 million more to upgrade the equipment, the annual profit can even reach 10 million AUD.