His hands were shaking. He had terrible difficulty holding the chalk, moving slowly on the green board, as well as the notebook between his arm, from which the sheets occasionally fell. Mr. Yuan turned towards his class, breathing slowly.

"Excuse me, students, but I think the lesson will have to end here. You can complete the questions on page 55."

He lowered his arm and sat at his desk, panting. His health condition was getting worse and worse. A certain anxiety, linked to heart problems, prevented him from working. A pencil rolled to the ground, so he got up to go get it. This move was a bad idea. He got lower to the ground and clutched his chest, breathing, head raising, very hard. Of all the class, you, a male student, was the only one who knew his condition, since he was one of your parents' friends. So he looked down at you. Without speaking, he looked at you for help.