We are staying at Tailong Hotel (51 Donganmen Street, Dongcheng District, Beijing)

Walk from your hotel to Wangfujing MTR Station to take local subway line 1 to Fuxingmen Station, where transfer to MTR line 2 and get off at Jishuitan Station. Get out from Exit B, and you can easily walk to Deshengmen bus stop to take bus no. 919 to the great wall section directly.