How do you say 'thank you very much' in Chinese?

Thank you very much in Chinese is 謝謝你. This is pronounced "xie4xie4 ni3" in Hanyu Pinyin. In Gwoyeu Romatzyh it's pronounced "shiehshieh nii." Another way of saying "thank you very much" is 感謝你. This is pronounced "gan3xie4 ni3" in Hanyu Pinyin and "gaanshieh nii" in Gwoyeu Romatzyh.