About 2 days. According to Baidu map, the distance from Guangzhou Municipal People's Government to Nanning Municipal People's Government is about 560 kilometers, and the time limit promised by the courier company is about 2 days. The courier company has a perfect logistics network and route planning, and can transport the goods from Guangzhou to Nanning by fast transportation (such as air or high-speed land transportation), which can be delivered in about 2 days. So it takes about 2 days to express from Guangzhou to Nanning.