Nanning is a tourist distribution center in Guangxi. Your first stop will be Nanning. The main attractions in Nanning are food shopping and park leisure tour. If you like delicious food, I recommend you to find special snacks in Shuijie, Zhongshan Road and Qixing Road. In terms of sightseeing, the daytime routes are: Nanhu Square-Qingxiu Mountain Park-National Museum. Nanhu Square at night-(Jinhu Square) is also called Wuxiang Square-Folk Song Lake Leisure Bar Street-Exhibition Center. Leisure play: Nanning Zoo, leisure and health tour: Guangxi Medicinal Botanical Garden-Jiahecheng Hot Spring. If you have more time, you can spend two days in Nanning. If you want to spend more time playing Beihai, Nanning can do it for one day and one night.
From Beihai to Nanning, it takes almost three hours by train or bus.
The tourism resources in Beihai are mainly silver beach surfing and old streets. If you eat, Laojie, Sanzhong Road, Fu Gui Night Market Road and Qiaogang Style Food Street all have special snacks, so it's no problem to eat here for one day and one night.
If you still go to Weizhou Island. I suggest you stay on the island for three days. It is best to travel from Nanning to Beihai, first to Weizhou Island, then to Beihai, and then to waste time on the island. Weizhou Island needs to arrange its route according to the tide and weather. I will give you more information about your trip and travel information for your reference.