How to get back to Xian from Mt. Hushan?

Please help me some questions:
1. What time and schedule of some latest Huangfuyu Tourism Bus from Wamiaogou to Tourist Service Center in the afternoon please? How far of this distance, May I walk ?
2. What is the operation time of Tourist Service Center please ?
3. After that, how to go from Tourist Service Center to Huashan North train station please ? (If taxi is must, then how much and how safety for one person can make it).
Thank you very much.