What does the word seagull mean to describe people?

Hello, the word seagull describes high-level talents who stay overseas and don't return home. It also refers to international students who frequently travel to and from China and overseas for business and trade activities. They are highly mobile and often cross the East and West in business, or one or two countries, and become the vanguard of China's internationalization. You can refer to it and hope it will be useful to you! If it is useful to you, please give me a "favorable comment" as an encouragement. Thank you!