Wu Youyou looked at herself in the mirror and tried hard to smile, but a huge feeling of sadness quickly spread from her abdomen to her brain, occupying her emotions, and tears flowed out involuntarily. She tried her best to calm down her emotions and continued to smile. Although it was not perfect, it still looked like a smile. But the sadness surged up in her chest again. She swallowed it down hard and forced out a smile. Her eyes were filled with tears, and she could no longer see her own expression in the mirror. She knew that she had to smile, no matter how sad she was, she couldn't cry, she had to smile, smile, smile forever...