Just like to ask, what is the best way to Badaling? I am staying near Wangfujing.

It is suggested to walk to Wangfujing MTR Station to take suwbay line 1 to Fuxingmen Station, where transfer to line 2 to Jishuitan. Upon arrival, walk to Deshengmen Arrow Tower, near which you may find bus no. 919 or 880. Either of which can take you to the wall section directly.