How do you say Steven in Chinese?

There are two main ways to say "Steven" in Chinese, depending on the romanization system used:

Pinyin: Stīvèn (斯蒂芬)

Wade-Giles: Ssu¹-t'i¹-fên² (史蒂芬)

The pinyin pronunciation is more common nowadays, but you might encounter the Wade-Giles version in older texts.

Note: The tone marks indicate the tones of the syllables.

You can try saying "Stīvèn" or "Ssu¹-t'i¹-fên²" to get a sense of the pronunciation, but it's best to listen to a native speaker to get the correct intonation and rhythm.