I will go to Guangzou from Wuhan at 8 jun 14, How to by ticket from Wuhan to Guangzou ? What price ?

you can purchase the ticket at Wuhan railway station 20 days before departure with your original passport.
the price of D trains (6 hours on the way) is CNY 328.5 for second class seats and CNY 528.5 for first class seats; that for G trains (4 hours on the way) is CNY 463.5 for second class seats and CNY 738.5 for first class seats.