Cai inherited his superstitious side from his paternal grandmother, who hired a female shaman to take care of him, cure his minor ailments and answer his questions. Later, when going abroad to pursue his studies and participate in exhibitions, he would always carry talismans with him.
這份「迷信」來自奶奶，奶奶從小就請一位女巫師照顧他，解決他的小病與疑惑，後來他在國外求學參展時，也都有專屬的符咒相伴。