The joke is that a woman goes to the army and then jokes.

Hua Malan still practices every day after becoming a general. One day, he was riding a horse and had his period. Once, he accidentally fell off his horse and fainted. When she woke up, the eyes of the soldiers full of tears were swollen. Mulan said, Nothing, but I fell down and lost some blood! At this time, the lieutenant cried sadly: General, not only did you lose some blood, but your ... your brother was thrown down. It took the military doctor a long time to sew up the wound!