I want to go to Zhuhai from Guangzhou City, what is the best way? train or bus?

If you are near the GZ South Railway Station, you are advised to take the high speed train. It only takes 1 hour and the ticket fare is CNY70/person for a second class, CNY90/person for a first class.
You can also take a shuttle bus at GZ South Bus Station. It operates during 09:30 to 22:00 with the interval of 30-60 minutes. The ticket fare is CNY65/person.
You can take the children to visit the Fei Beach.
You can take the airport shuttle at Gongbei Bus Station, no.1, Lianhua Road or no.299, East Meihua Road, Xiangzhou. The bus will start at 05:00 in Gongbei and the last one will depart at 19:30. The ticket fare is 88/person. The duration is about 3 hours.