Our Plan will be from the Philippines, Manila to Guangzou to Shenzhen to Hongkong to Manila.

1.) Our Plane ticket will be considered round trip if it will be: from Manila - via Guangzou train - Shenzhen (3 days) - Hongkong (2 days) - Manila, Philippines. Is this considered as a round trip ticket? this is one of the tourist China visa requirement.
2.) I only need single visa as I understood. Am I correct?
3.) How many hours bullet train from Guangzou to Shenzhen? How much bullet train fee per adult & a 5yr old from guangzou to Shenzhen? What is the schedule time of bullet train from Guangzou to Shenzhen?
4.) I forgot the name of the amusement park near the Windows of the world, what is it now?
5.) What is the name of the small hotel where you can see that amusement park at the back of the hotel window?
6.) I stayed for 2 to 3 months in Shenzhen before from June to Sept 2007 and I have difficulties in communications with people to ask some important guidelines, can you give me a telephone # that can help me whenever I need a translator? Thank you.