Cycle render difference from viewport (render problem with hair particle)

[DENG_XC]

Hi, guys, I am new to this forum, not sure it is the right place to ask question?
I am learning hair particle recently, I use particle system to make eyelash for my sculpting character, everything go smooth until I try to render the image. out put of cycle render get something weir, the eyelash become black stuff. eevee does’t have this problem, not sure what cause this problem, any help would be appreciate.

[DENG_XC]

sorry that post again, I can only post one picture for each post (because I am new user), below is the particle system setting.