what is the most convenient way to get from kunming to Wuzhou and then from Wuzhou to Doumen/Zhuhai?

From Kunming to Wuzhou, you are suggested to fly to Nanning first. Take shuttle bus line 2 to Jiangnan Bus Station. There you can take a long-distance bus to Wuzhou in around 4.5h. To ZH, you can head for Wuzhou Jinhui Bus Station. Direct buses are available there. Bus will take you to Shangchong Bus Station or Qiguan Bus Station. Then transfer to a taxi to Doumen.