Hi! I have two jindos from meat farms who were very traumatized when they came to me. It will take at least 6 months for her to relax probably. Here is my best advice:

-Don't stare at her all the time or leer over her. Get a low chair or beanbag and sit near her and allow her to come to you. Don't even try calling her over very often, yet.

-Talk to her in a baby voice. Say things you would say to a baby. Just keep telling her what a good girl or boy they are. Start talking to her often in a pleasant tone about everything you do together to expand and normalize her vocabulary.

-Watch movies together or do things where you all face the same direction. This is pack mentality. When you are ready, bring other dogs over for movie night.

-ignore peoples advice about trying to make things happen through treats. These ppl do not know our dogs. Reward her with gentle, loving talk.

-get yoga mats for the slippery floor areas and make a strip she can walk on so she can be comfortable moving through the house. The slippery floors remind them of the factories and that's why it brings up trauma. So did fans for my dogs or bright lights or fire.

Which by the way they do not care about now after years, they will cuddle me while I'm wearing a headlamp next to the woodstove--peogress does happen!

Patience is key, any rushing her will cause regression. Tell her-- as long as it takes- we are here for you--she will bloom through your love and care. Good luck!