香港特区政府：6月向中国内地总出口黄金量为34.719吨，此前为57.76吨。6月向中国内地净出口黄金量为19.366吨，此前为48.127吨。

Group 1 - The core point of the article highlights a significant decrease in gold exports from Hong Kong to mainland China in June, with total exports dropping to 34.719 tons from 57.76 tons previously [1] - The net gold exports to mainland China also saw a decline, falling to 19.366 tons in June compared to 48.127 tons earlier [1]