It just takes about 20 minutes' walking from your hotel to Forbidden City, and you can also take bus no. 1,4,52,10,37,120,802,126,20 from Wangfujing to Tiananmen Square where Forbidden City is located through 1 stop. Then take bus no. 2, 20, 120 from Tiananmen Square East to Temple of Heaven. After that, take bus no. 826 from West Gate of Temple of Heaven to Summer palace. Finally, take bus no. 817/394 from the east Gate of Summer Palace to Gongzhufen North, transfer to Beijing Subwya line 1 to Yonganli, and then walk to Silk Market Mall.