Sentence:  Although the primary mathematical properties of the middle number at the center of the Lo Shu , and the interrelation of all the other numbers to it , might seem enough to account for the deep fascination which the Lo Shu <WSD>held</WSD> for the Old Chinese philosophers , this was actually only a beginning of wonders . 
Meaning of the word marked with <WSD> tags:  have or possess, either in a concrete or an abstract sense