However, they were also unsuccessful in creating another clock tower, and Su Xie was convinced that Su Song had purposefully left out essential components in his written work and diagrams so that others would not steal his ideas.
Con todo, tampouco tiveron éxito na creación doutra torre do reloxo, convencéndose así Xie que o seu pai deixara deliberadamente algúns compoñentes esenciais fóra da súa obra escrita e diagramas para que outros non roubasen as súas ideas.