feng is pronounced as: fēng, fèng, fěng, fèng.

The first syllable fēng in pinyin feng (f and eng) is composed of the initial consonant f + the back nasal final eng + the first tone symbol, with the tone marked on e.

The third syllable fěng in Pinyin feng (f and eng) is composed of the initial consonant f + the back nasal final eng + the third tone symbol, and the tone is marked on e.

The second syllable féng in Pinyin feng (f and eng) is composed of the initial consonant f + the back nasal final eng + the second tone symbol, with the tone marked on e.

The fourth syllable fèng in pinyin feng (f and eng) is composed of the initial consonant f + the back nasal final eng + the fourth tone symbol, with the tone marked on e.

Introduction to Chinese tones:

Each Chinese character consists of finals and initial consonants that together form a syllable. The tone should be marked on the upper part of the vowel, but it can be omitted for convenience. Tone affects tongue position, not just vocal cords.

The rules for marking tone positions in Chinese Pinyin are as follows: if there are two finals (vowels) and the first final (vowel) is i, u, or ü, then the tone is marked in On the second final (vowel). In other cases, the tone should be marked above the first final (vowel).