Grateful heart song story origin

A heartfelt sign language song, rather than the lyrics and melody of the song is poignant and moving, the origin and connotation of the song is more tearful and inspiring. 

There was a little girl who was born with aphasia, and her father died when she was very young. She and her mom were dependent on each other. Her mom went out to work early in the morning and didn't come back until late. Every sunset, the little girl began to stand in front of her house, looking expectantly at the road in front of her door, waiting for her mom to come home. When her mother came home it was the happiest time of the day for she brought her a piece of rice cake home every day. In their poor home, a small piece of rice cake was considered a delicacy! 

One day it was raining hard, and it was past dinner time, but her mother had not yet returned. The little girl stood in front of the house and looked and looked, but she could not wait for the familiar figure. As the sky became darker and darker and the rain became heavier and heavier, the little girl decided to follow the path her mother took every day to find her mother. She walked and walked and walked for a long time, and finally saw her mom on the ground by the side of the road. She ran up to her mom and shook her vigorously, but she didn't answer her. She thought her mom was too tired and had fallen asleep. So she put her head on her lap and tried to make her mom sleep more comfortably. But then she realized that the eyes were not closed! The little girl suddenly realized: her mom might be dead! She felt very fearful, pulled over her mother's hand, shaking it vigorously, only to find that her mother's hand is still tightly tugging a piece of rice cake ...... She cried desperately, but could not make a sound. 

The rain kept falling and the little girl didn't know how long she had been crying. She knew her mom would never wake up again, and now she was all alone. Then why didn't the eyes close? Was it because they didn't worry about her? She suddenly realized what she should do. So she wiped away her tears and decided to use her own words to tell her mom that she would live well and let her mom go without worry. The little girl did the "Grateful Heart" in sign language over and over again in the rain, tears and rain mixed together, sliding down from her small but strong face. Just like that, the little girl stood in the rain and did it without stopping until those eyes closed ......