➀ Filters are critical components in wireless communication, with their role becoming increasingly significant in the digital intelligent era. The entry of domestic capital and the fierce competition in the past two years have led to the current predicament of domestic filters. ➁ The TF SAW technology, represented by new routes, is considered the 'best way' to achieve breakthroughs in domesticization. ➂ However, it is necessary to evaluate TF SAW from multiple dimensions such as technology, cost, market, and patents. ➃ The article also points out the three major misunderstandings about TF SAW, including its dependence on substrate materials, the potential for homogenization and internal competition, and the fact that it is not a superhighway for domestication but a detour for Murata and Qualcomm.