Shandong Energy
... that Longkou Mining Group, a subsidiary of Shandong Energy, is the only company in China mining coal under the sea?
... that Longkou Mining Group, a subsidiary of <b id="mwDbQ"><a href="./Shandong_Energy" id="mwDbU" rel="mw:WikiLink" title="Shandong Energy">Shandong Energy</a></b>, is the only company in <a href="./China" id="mwDbY" rel="mw:WikiLink" title="China">China</a> mining coal under the sea?