What is the meaning of "Guang" in "Guangdong and Guangxi"?

"Guang" in "Guangdong and Guangxi" refers to "Guangxin".

Since ancient times, Guangdong and Guangxi have been connected by mountains and rivers, and people are connected. The division between Guangdong and Guangxi began in the Song Dynasty. Bounded by ancient Guangxin (Guangxin, the capital of Jiaozhou in Han Dynasty, is located in the intersection of Wuzhou, Hezhou, Guangxi Fengkai and Hejiang. In recent years, experts and scholars have confirmed that since 106 BC, Guangxin, as the political, economic and cultural center of Lingnan, has been known as the "ancient capital of Lingnan" for more than 300 years, and is the earliest birthplace of Lingnan culture and Cantonese. )。 The east of Guangxin is called Guangnan East Road, namely Guangdong. To the west of Guangxin, it is called Guangnan West Road, which is Guangxi. Guangdong and Guangxi were officially named in the Northern Song Dynasty, and Lingnan can be called Guangdong and Guangxi from now on.