Formal:
* 我叫... (wǒ jiào...) - This is the most common and formal way to introduce yourself. It literally means "I am called..."
* 我的名字是... (wǒ de míngzi shì...) - This is another formal option, meaning "My name is..."
Informal:
* 我叫... (wǒ jiào...) - This can also be used in informal situations.
* 我姓... 名字是... (wǒ xìng... míngzi shì...) - This is a more detailed way to introduce yourself, meaning "My surname is... and my given name is..."
Example:
* Formal: 我叫张三 (wǒ jiào zhāng sān) - My name is Zhang San.
* Informal: 我叫小明 (wǒ jiào xiǎo míng) - My name is Xiaoming.
Important note:
In Chinese, you say your surname first, followed by your given name. For example, "张三" (Zhāng Sān) - "Zhang" is the surname, and "San" is the given name.