Hi we will be in Beijing from jan 2-7,we’ll be staying near wangfujing.

Nanshan Ski Resort is recommended!
You can take metro line 1 and change to line 2 at Jianguomen.
Get off at Dongzhimen and leave from Exit B1, walk northeast for 300 meters to the Dongzhimen Bus Station.
Then, you can catch Bus 980 Express to Taiyang Jiayuan.
After that, catch a taxi to the ski resort within 15 minutes.