Although it's been several weeks since Aunt Lin came back, she hasn't stepped out of the outside world, because she was very sick.
I know it's surprising to hear that, but Aunt Lin is still sick. She had different sections of Chemo, but it only helped to extend her life span for a few years.
A test was done on her few months after she started her Chemo, and it was discovered that she had already entered the last stage of Cancer.
But Aunt Lin chose to continue with the treatment with a glimmer of hope in her eyes. She finally gave up when she noticed that her situation wasn't changing, so she gave up treatment, and decided to come back home.
HuiQing was heartbroken, but he knew he had to be strong for her. He needed to be by her side to continue supporting her.