The 2020 Polarized Neutron Advisory Workshop will be hosted by the China Spallation Neutron Source (CSNS) from December 10th – 14th, 2020 in Dongguan, China, the conference will be helding offline+online, where topics related to polarization methods, instrumentation, and technical challenges will be presented. This workshop serves as a platform for scientists and engineers interested in polarized neutrons to share their latest research at state-of-the-art neutron facilities and universities from around the world. In addition, this workshop will stimulate scientific discussion among experts in the field of polarized neutrons and provide an opportunity for them to advise CSNS on how to improve its capabilities as an international research facility.