![](/sites/default/files/styles/large/public/cover_images/81e028ceea39c6c663373f2efaa3.jpg?itok=ekd6mMgc)
Heidongzi Introduction: Heidongzi mining site is the oldest one, dating from the Qin and Han Dynasties. Such a mercury mine site with a long history, well-preserved and large scale is the only one in the country and is of extremely high value.
Heidongzi Introduction: Heidongzi mining site is the oldest one, dating from the Qin and Han Dynasties. Such a mercury mine site with a long history, well-preserved and large scale is the only one in the country and is of extremely high value.