Huw can i go from Wuhan to Hunan Phoenix Town retern to Changsha?

You are suggested to take a bullet train to Huaihua first, and it takes about 3 hours, CNY522.5 for a first class seat, CNY318.5 for a second one.
After you get there, you can take bus 116 to Huaihua West Bus Station, from where you can take the bus to Fenghuang, which takes about 1 hour and CNY39.

If you want to back to CS, you can take the bus from Fenghuang Bus Station, which is available from 8:00 to 18:00.