'Xīn péng you' literally means 'new friend' — a person you have recently met and begun to form a friendship with. The character 新 (xīn) means 'new' or 'fresh', while 朋 (péng) and 友 (yǒu) together form the compound word for 'friend'; historically, 朋 referred to peers of similar status or students studying together, and 友 implied mutual affection and trust. In modern usage, they function as a single noun unit, with no productive separation — you wouldn’t say *xīn péng* or *xīn yǒu* alone to mean 'new friend'.

This term is neutral in register and commonly used in everyday conversation, social introductions, school settings, or when describing personal relationships. It carries positive connotations — meeting a new friend is often associated with excitement, openness, or personal growth. Unlike more formal terms like 新结识的朋友 (xīn jiéshí de péngyou), 'xīn péng you' is concise and natural in speech, especially among younger speakers or in informal writing.