What do you mean by zhen de ma in mandarin?

"Zhen de ma" (真的吗) in Mandarin literally translates to "really?" or "is that true?" It's a common expression used to express surprise, disbelief, or doubt.

Here are some examples of how it might be used:

* "你真的要搬家吗？" (Nǐ zhēn de yào bān jiā ma?) - "Are you really moving?"

* "你真的会说中文？" (Nǐ zhēn de huì shuō zhōngwén?) - "You really speak Chinese?"

* "这个蛋糕真的很好吃！" (Zhège dàngāo zhēn de hěn hǎo chī!) - "This cake is really delicious!" (Here, it's used to emphasize the deliciousness of the cake)

The tone of voice can influence the meaning. For example, saying it with a rising intonation can express surprise or disbelief, while a flat tone might be more neutral.