"How much Yuan should I bring for 10 days in Beijing, I will be traveling by train to nearby cities, such as Shanghai? I am traveling alone".
Clyde,
Temple Hills.
Clyde, if you have an ATM card, there is no need to bring lots of cash, you can withdraw money at the ATM's as you go, there are ATM machines at the train stations.
Here's more on changing money, exchange rates and using ATM cards: Chinese Money Questions