By this logic, looking back at the fact that the field marshal piece in Tang dynasty xiangxi was not limited to a particular location, obviously Tang dynasty society was more open, and this correspondingly influenced the structure of chess. The successor dynasty to the Tang, the Song, constructed a system of centralized authority.
若依此推理，回溯唐代象戲中的王，也不受九宮限制，顯然唐代社會開放，同樣影響著象戲的體制。