免费日韩片_欧美成人精品一区二区男人小说_国产乱码一区二区三区四区_国产精品国产三级国产aⅴ入口_成人看的污污超级黄网站免费_欧美一级在线免费观看_成人午夜免费无码福利片_国产乱人伦偷精品视频色欲_aaa少妇高潮大片免费看_国产精品1234_亚洲精品国产suv一区88_中文字字幕在线中文无码_精品亚洲区_午夜九九九_国产av国片精品jk制服丝袜_色综合亚洲_亚洲成av人片无码bt种子下载_欧美色就色_精品少妇的一区二区三区四区_男人用嘴添女人下身免费视频

Record winning piece of coal, at Jinhua National Mine Park in Datong, on Nov 21. [Photo/dtnews.cn]

The Jinhua National Mine Park's Coal Museum, in the city of Datong, Shanxi province, has gotten a Guinness World Record for one of its more interesting exhibits -- the largest piece of coal ever mined -- with a weighing of 12.8 tons, Datong Daily reported on Nov 22.

Guinness certificate for the massive piece of coal, on Nov 21. [Photo/dtnews.cn]

The Guinness Shanghai branch issued the certificate of authentication to the mine park after listing in its records.

This piece of coal contains the largest amount of heat in one rock, averaging 7,000 calories per kilogram, and is from the Jurassic period, dating back 140 million years. It was dug from a spot 300 meters down.