forbidden city ticket

1. You can book a ticket for the Palace Museum at the official website in advance. But the booking system is in Chinese, so you can ask your Chinese friends for help. And the National Museum is free of charge. Just use your passport and pick up a ticket at the Ticket Office to the south of the West Gate.
2. As I know, very few attractions accepts payment with credit card, so you are suggested to exchange enough Chinese Yuan and pay in cash.
3. Take metro line 6 to Chaoyangmen station from Dongsi station. Then, change to line 2 to Dongzhimen Station. After that, transfer to Airport Express line to PEK. The fare totals CNY 28.