Where the hairs disappear

I was working with my model with the hair particles. And suddenly the hairs disappear. It was view few hours before.

Blend File

A screenshot taken few hours before

The setting are visible in the tab and visibility also seen.

But the hairs not visible in the viewport. I tried to backup the file but it was to late. Now i cant see the hairs on the body they are visible but not seen on the viewport. Any way to get back to viewport plz. help or suggestion. :cry: Thanks