广信为岭南早期文化重心论──兼论汉代杰出经学家陈氏父子郭培忠著名历史学家罗香林在４０年代曾经指出：“由汉至南北朝……，此时广东与中原的交通．亦以西安为中心。庄西安经汉中沿汉水南下，至洞庭湖，溯湘水而至粤桂交界。中原的学术思想由此交通孔道向广东传播。东... Guangxin for Lingnan early cultural center of gravity ─ ─ On the Han Dynasty distinguished scholar Chen Pei-zhong Guo Peizhong famous historian Luo Hailin pointed out in the 1940s: "From Han to Northern and Southern Dynasties ... ... At this time of traffic in Guangdong and the Central Plains Xi’an as the center Zhuangxi An Hanzhong along the Han River south, to the Dongting Lake, Xiangshui and Guangdong and Guangxi at the junction of the Central Plains of academic thought by the traffic channel to Guangdong.