Are you serious? Really?

• Expresses disbelief, surprise, or annoyance
• Text-slang interjection

真的吗？认真的吗？

• 表示不信、惊讶或恼火
• 聊天用的感叹词缩写

As an adverb: seriously

• Indicates sincerity, importance, or strong degree
• Often used as an intensifier in chat

作副词：认真地；确实

• 表示真诚、严肃或程度很深
• 常用于聊天中作加强语气