Hi, I'm Silvia from Indonesia, and I and my mom are planning to come to Guangzhou from Hong Kong/Shenzhen. I think I'm going take the MTR from Hong Kong to Shenzhen, and I have the following questions:

1. How many hours does it take by train from Shenzhen to Guangzhou?
2. How much is the train ticket per person from Shenzhen to Guangzhou?
3. What's the name of the fastest train should I take from Shenzhen to Guangzhou and to which train station should I take?
5. What is the temperature in Guangzhou and Shenzhen and Hongkong during October? Does it rain a lot or windy? My mom is old already :-)
4. We're planning to take Visa on Arrival to Shenzhen and Guangzhou at Lohu. Is it possible? How much does it cost per person and how long (how many hours or days to get that visa)?

Thank you so much!