Sentence:  Thus the middle number , 5 , <WSD>represented</WSD> Sung-Shan in Honan , Central China ; the 3 , T ' ai-Shan in Shantung , East China ; the 7 , Hwa-Shan in Shensi , West China ; the 1 , Heng-Shan in Hopei , North China ( or the mountain with the same name in neighboring Shansi ) ; and the 9 , Huo-Shan in Anhwei , which was then the South Sacred Mountain . 
Meaning of the word marked with <WSD> tags:  express indirectly by an image, form, or model; be a symbol