Qi is a key element in Chinese cosmology and is important for understanding how people practice Traditional Chinese Medicine and fengshui in Taiwan. As qi is an intangible, invisible concept, it is important to determine how people sense the existence of it. In response, Sung looks at material culture to examine new Taiwanese fengshui objects and modern diagnoses devices of Traditional Chinese Medicine. He finds that fengshui objects, especially mirrors, crystals, and jingluo (meridians) are diagnostic devices that all help people to grasp the concept of qi in a material way. These materials, which have potential for technological application, obscure the border between science and folk belief. However, they also draw new concepts into a traditional cosmology. This combination of traditional belief with science leads us to reflect on the issue of ‘modernity’ in contemporary Taiwan.