Dear Tony
I got to know your grandpa is coming to beijing.
Your grandpa is right,The bus service in beijing is really good. Now there are bus. They are all over beijing and buses can Even take you to a small village.Besides spare things are often on buses, people do not have a spend a long time writing for a bus the tickets are cheap.
I like taking a bus because I think it‘s comfortable and also good for the environments. So it’s good trials for your grandpa to travel in beijing.
If you have more questions, please ask me.
Yours
Tom.