1. Pinyin:
* Sìdní (悉尼) - This is the most common and accurate way to write Sidney in Chinese, specifically referring to the city of Sydney, Australia.
2. Other possible transliterations:
* Xīdní (西德尼) - This is a less common transliteration, but it might be used in some cases.
* Sīdénǐ (西德尼) - This transliteration is also possible, though less common.
Ultimately, the best way to write Sidney in Chinese depends on the specific context and your preference for pronunciation. If you're referring to the city, Sìdní (悉尼) is the most appropriate and widely understood option.