Towards the merger of Hawking radiating black holes

We discuss the merger process of binary black holes with Hawking radiation taken into account. Besides redshifted to infinity, can exchange between themselves, which is first and then blueshifted when it propagates from one hole other. The rate should be large temperature-divergent horizons are penetrating each other form a single horizon unique temperature. This will cause non-negligible mass angular momentum transfer during merging horizons. further argue in ratio limit that light whose local evaporation enhanced by competing redshift-blueshift effects probably evaporate or decay completely before reaching heavy one. also possibility testing even exploring information loss puzzle gravitational wave observations.