One fundamental issue in the iron-based superconductors is whether the conventional local moment Heisenberg model is sufficient to describe magnetism in these materials, or itinerant electrons are also entangled in the AF states of iron pnictides, or the system can be fully described by a simple Fermi surface nesting scenario.It would be very important to study temperature dependence of high energy spin excitations for better understanding.Recent unpublished data collected at MAPS by our group revealed that spin-wave-like paramagnetic excitations in BaFe2As2 near the zone boundary for temperatures up to 2.1TN , with no evidence for the expected zone boundary magnon softening. However, it is still unknown how high temperature could completely kill the high energy paramagnetic excitations.Thus it would be highly interesting to collect data at much higher temperatures (say around 900 K).