Đang chuẩn bị liên kết để tải về tài liệu:
Some facts about mining situation before the french regime in Cao Bang

In Cao Bang Province many precious minerals can be found. In Vietnam’s official history, gold mines were mentioned as existing in Quang Nguyen (during the Ly Dynasty) and Tin mines were said to exist in Vu Nong, both of which were worked for a long time. In Cao Bang, the feudal court wished to develop mines for the economic benefit that could be obtained. |