How do I get ticket ,Beijing to shantou ,using the bullet train for the journey

There is no direct rail connection between, you may try go via Xiamen if you want high speed type. The trip from Beijing to Xiamen would be about 11 hours and then you can go from Xiamen to Chaoshan by rail and the trip would be about 90min. You can take the bus or taxi from there to Shantou city.