"熊出没" is a Chinese phrase that literally means "bear appearing" and is used to refer to a situation where a bear is spotted in a place where it is not normally found. If you want to describe "熊出没" in English, you could say "bear sighting" or "bear appearing." For example, you could say "There was a bear sighting during the Chinese New Year holiday" to describe a situation where a bear was spotted during the holiday.
