Year: 1977
Location: hospital

Yanghunzi caught a cold, and he was taken to see the doctor.
Doctor recommended Ching Mei Su (or Qing Mei Su or Penicillin) injection.
The injection is on his left butt.

Year: 1977
Location: hospital

Yanghunzi keeps coughing, and he was taken to see the doctor.
Doctor recommended Ching Mei Su injection again.
The injection is on his right butt this time.

Year: 1977
Location: hospital

Yanghunzi got a fever, and he was taken to see the doctor.
Doctor recommended Ching Mei Su injection, his butt hurts so bad.

Year: 1977
Location: hospital

Yanghunzi fell unconscious during class because of the overwhelming hurts on his butt , and he was carried to see the doctor.
Of course, the doctor used Ching Mei Su injection.

Year: 1999
Location: anywhere

Yanghunzi is reviewing his painful Penicillin childhood with visiting friend Shudaizi.
Yanghunzi asks, "do you have Ching Mei Su injections every time you got sick when you were a kid?"
Shudaizi, "not really, but every time I have to overdose my mom's Chicken and Soup."
Yanghunzi, "Chicken and Soup, it even sounds like Ching Mei Su, boy, you must have had a sickening childhood too."