For your Beijing-Changsha leg, there are 5 express G trains daily, with trip times 5:38 to 5:42. Departing Beijing from 8:00 to 13:02 and arriving in Changsha from 13:38 to 18:41. Ticket price for Beijing-Changsha 2nd class 649 yuan, 1st class 1038 yuan, business class 2050 yuan.
The route also has 11 non-express G trains, trip times 6:31 to 7:38, ticket cost same except 2 trains have VIP class instead of business.
Changsha-Futian leg has 10 trains daily, with trip times 3:04 to 3:42. Departing Changsha 7:50 to 20:26, arriving Futian 11:32 to 23:47. 2nd class 397 yuan, 1st class 612 yuan, business class 1210 yuan. Some of the 10 trains have VIP class instead of business, some have both.