What does pig's head recruitment mean?

I would understand if it was a pig's head. The correct solution should be: Headhunting in English. In foreign countries, it is a very popular way to recruit talents. Hong Kong and Taiwan translated it as headhunting, so we also called it headhunting after it was introduced to the mainland, which means "recruiting senior talents". Commissioned recruitment of senior talents, also known as headhunting service or talent search service. A company specializing in middle and senior talents is often called a headhunting company to adopt.