 In 2016, Harold White's group at NASA's Advanced Propulsion Physics Laboratory reported in the Journal of Propulsion and Power that a test of their own model had observed a small thrust.In December 2016, Yue Chen of the communication satellite division of the China Academy of Space Technology (CAST), said his team had tested several prototypes, observed thrust, and was carrying out in-orbit verification.In September 2017, Chen talked about this CAST project again in an interview on CCTV.