When I went there, there was no shuttle bus to Sandu. Now it’s the peak season. I don’t know if there is an extra bus. I can only take a bus from Qikong Scenic Spot to Libo County Bus Station. The ticket is 7 yuan, and Libo sends it to Sandu. The shuttle bus is available in the afternoon. It is recommended to follow Guizhou Haoxing on WeChat to know when the bus is available. I hope my answer can help you refer to it.