Let's put aside the matter of impersonation, just the crime of occupying a large amount of other people's property alone could land someone in prison for at least three years.
Moreover, after Chu Lian's death, the heir to that house was Chu Lian's stepfather, so what Lee Mi did was considered fraud.
Originally, if Chu Lian's stepfather had not been insistent on suing her and was willing to forgive her, she wouldn't have had to go to prison, but he now hated her deeply.
Not only had Chu Lian tricked the house away from him, leaving him homeless for a long time, but he also felt that if it weren't for her meddling that day, Chu Lian's "accidental fall to death" would have been the outcome, and he wouldn't have had to go to prison.
Forgiveness was impossible, and in the end, Lee Mi was sentenced to four years.
…
Lee Mi had rented the small suburban earthen building using Chu Lian's name.