本文辨证李白在安陆期间的事迹：一、开元十七年春后上书安州李长史；二、开元十九年自安陆首次入京；三、开元二十一年“浮黄河去京阙”......

The Dalongshan A-type granite belongs to the Anlu (Anqing,Zongyang and Lujiang)A-type granite belt, the rocks of Dalongs......