What was the joke about eating eggs when I was a child?

On one occasion, the heads of various units concentrated on a place to study for a week. According to the custom at that time, breakfast was steamed bread, steamed stuffed bun, rice porridge, plus one boiled egg for each person. One morning, a leader ate breakfast as usual, peeled the egg and found that it was bad. He said to the waitress, "Please change an egg for me. This egg is bad. " After a while, the waiter returned to the restaurant with an egg. However, she forgot which leader at which table wanted to change eggs. No way, there were many people, so she shouted, "Whose egg is broken?"

All the leaders were silent. She shouted, "Whose egg is broken?" And no one answered. Then the director of the restaurant came up to the waiter and said, "How rude you are to shout like this! You should ask-"He roared:" Which leader's egg is broken? " Just after shouting, I found something was wrong, so I quickly changed my mouth and shouted, "Which leader is the bad guy?"