Every time, Aunt Mao would personally watch He Yi drink the water in the cup.
And after drinking the water, He Yi's weakness would worsen. She concluded that there was something wrong with the water.
He Yi thought of an idea. After drinking the water, she requested to go to the bathroom. But Aunt Mao was a smart person. She seemed to have been prepared for this.
"You can't go to the washroom after drinking the water." Aunt Mao's eyes were full of shrewdness. She sneered and said, "Wait for half an hour!"
Aunt Mao understood the trick of drinking the water before going to the washroom and digging her throat to spit it out. This would not fool her.
Once the plan failed, He Yi could only come up with another plan.