This is a dynamic black shelter Touch Stone (试金石) from Guangdong province in southern China. This jet black, basaltic river stone is skillfully positioned on a platform-style base to create a resting or gathering place for friends to meet and debate a philosophical topic. This stone, collected by Luo Dongchao, was exhibited in the Sun Yat Sen Memorial Hall in Guangzhou during the joint Bonsai Clubs International and Asia Pacific Bonsai and Suiseki (ASPAC) convention held in September 2015.