Formal:
* 你好,我叫保罗。 (nǐ hǎo, wǒ jiào Bǎoluó.) - This is the most common and formal way to introduce yourself.
Informal:
* 嗨,我叫保罗。 (hāi, wǒ jiào Bǎoluó.) - This is more casual and suitable for friends or people you know well.
More specific:
* 你好,我叫保罗,很高兴认识你。 (nǐ hǎo, wǒ jiào Bǎoluó, hěn gāoxìng rènshi nǐ.) - "Hello, my name is Paul, nice to meet you."
* 你好,我叫保罗,请多多关照。 (nǐ hǎo, wǒ jiào Bǎoluó, qǐng duōduō guānzhào.) - "Hello, my name is Paul, please take care of me."
Important note: The pronunciation of "Paul" in Chinese is "Bǎoluó", which is a close approximation of the English name.