Rigify

please help, thank you so much!
i use rigify addon, after click generate rig button, why in pose mode, i rotate this rig, my head deform like this:

i have paint weight, like this:

i have paint weight, like this:

Let’s start with the basics, and be sure you have reset the scale of the mesh to 1.

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thank you reply me, i have fix this promble.
my soultion is, after generate rig, show DEF, then paint DEF(those green bones) weight (not paint meta-rig weight), like this:

Ah - ok - I didn’t notice before; your weights needed more weight to the bones, yes.

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anyway, thank you!!!