Which Airport shuttle bus Line from BCIA to my hotel?

Hi, no direct shuttle bus can take you there.
You can take shuttle bus line 3 to Sanyuanqiao Station, where you can transfer to subway line 10 and get off at Fenzhongsi MTR Station. Upon getting off, you can walk to your hotel within around 250m. No taxi is needed.

Hi, I will be staying at Beijing Sichuan Dragon Garden Hotel - No. 312 Xiaohongmen Road, Chaoyang District, Chaoyang, 100164 Beijing.

Thank you for answering right away.

1) What about from the hotel going back to the Airport? (As I can see in Line 3, the Airport Shuttle Bus dont go to Sanyuanqiao Station, it is different Route). Where do I wait for the Airport Shuttle Bus?

2) I have a child (6 yrs. old) with me. Is there a discount of RMB16.00?

From the hotel to airport, you can still take subway line 10 to Sanyuanqiao, where you can catch the express train to the airport very fast.

As for the ticket, if your kid is under 1.2m, it is for free. Otherwise, you need buy a ticket for him or her.