求翻译：　　自2003年以来，国家外汇管理局通过国内杂金提纯以及国内市场交易等方式，中国黄金储备共增加了454吨。在各国公布的黄金储备中，只有6个国家超过1000吨，中国排名世界第5。是什么意思？

　　Since 2003, gold purification, as well as the domestic market of foreign exchange by domestic hybrid deals, China's gold reserves were increased by 454 metric tons. The gold reserve announced in various countries, only 6 countries exceeds 1000 tons, China ranked 5th in the world.