My Mom Can't See, Always Misses Two Digits

Top-tier graduate Xia Ran donated her kidney to her mother and stayed in a small county town to give up a high salary. Over five years, her mother exploited her under the excuse of 'bad eyesight missing two digits,' draining 320,000 yuan. Meanwhile, the mother showed extreme bias toward her sister Xia Xiao, claiming Xia Ran's contributions were hers and squandering tens of thousands on her. On New Year's Eve, Xia Ran witnessed her mother lavish 50,000 yuan on her sister while her own New Year's dinner budget was only a few hundred yuan. During the feast, when the whole family accused her of 'making a profit,' she produced five years of transfer records and donation certificates. Everyone froze. Who is the person who was taken for granted to give everything?