The pronunciation of the character "Yue" with the side character "Fu" is "yù." This is based on the standard Mandarin Chinese phonetic system. The character "Yue" (月) is a common character that represents the moon and is often used in words related to time, such as "month" (月). When combined with "Fu" (父), it forms the word "Yufu" (玉父), which means "jade father" or "honorable father." The "u" sound in "Yue" is pronounced as in "you," and the "ü" sound in "Fu" is simplified to "u" in this combination.

The reason for this pronunciation is rooted in the Pinyin system, which is the standardized romanization of Chinese. In Pinyin, "ü" is often simplified to "u" when it appears after certain consonants, such as "j," "q," "x," "y," or "z." This simplification is due to the fact that the "ü" sound is not easily distinguishable from "u" in spoken language, especially when it is followed by these consonants. Therefore, in the character "Yue" with "Fu," the "ü" is pronounced as "u," resulting in the "yù" sound.

Data supporting this pronunciation can be found in various Chinese language textbooks and dictionaries. For instance, the "Hanyu Pinyin" system, which is the official romanization system for Chinese, clearly indicates that "ü" is simplified to "u" when it follows the consonants "j," "q," "x," "y," or "z." This is consistent across multiple resources, such as the "New Practical Chinese-English Dictionary" and the "Hanyu Pinyin Dictionary." These sources provide authoritative guidance on the pronunciation of Chinese characters and their combinations, reinforcing the "yù" pronunciation for "Yue" with "Fu.