Is there a shuttle bus from Dachaidan to Shuiyadan?

Yes. According to the Dachaidan itinerary, we know that there is a shuttle bus from Dachaidan to Shuangyadan. The total journey is about 238.4 kilometers and takes about 3 hours to arrive. Dachaidan Administrative Region is a county-level administrative region directly under the jurisdiction of the Hainan Mongolian and Tibetan Autonomous Prefecture. It is not a statutory county-level administrative region but is basically similar.