A joke in which a child writes to his father and circles unknown words?

There was a man named Jiang who drew a circle around all the words he couldn't write. One day, when my father was ill, Jiang wrote a letter:

Dear old:

I heard that you gave birth to a baby, so take good care of it and don't give birth casually! Your dear son: Jiang Xiaoling.

Father received this letter and asked his neighbor to read it. The neighbor thought it was an egg and read aloud, "Dear old egg, I heard you laid an egg. You should take good care of your eggs and don't lay them casually! " Your dear son: Jiang. "After hearing this, my father fainted.