Huaxin, just come by bus. I remember correctly 10 1. Actually, the two places are not far away.
If you want to save money, just take the train 14 yuan, and take Changsha bus 168 (you can ask there, for fear that I remember wrong) to the bus station. There is also a bus to Liuyang. This time it's 47 yuan. Save some, you can sit and play if you have nothing to do, hehe.