Using FBX2glTF.exe to convert FBX to GLTF format, the resulting character material is brighter and the model size is reduced by 100 times

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Using FBX2glTF.exe to convert FBX to GLTF format, the resulting character material is brighter and the model size is reduced by 100 times.

used model: https://threejs.org/examples/models/fbx/Samba%20Dancing.fbx

After the transformation：

How to adjust that?