how long by baiyun airport guangzhou by subway train to east railway station

My daughter and I are wanting to go to east railway station from baiyun airport guangzhou subway, then catching the bullet train to shenzhen,is it quicker then catching the shuttle bus. and also how much does it cost. and hjow much time does it take we arrive on the 28th of august in the morning about 6am. I know that the bullet train takes about 52 minutes