A good Chinese name isn't just about sound — it should also balance the baby's Bazi. The core principle is supplementing the favorable element.
Using the baby's birth date and time, arrange the four pillars. Find the Day Master (birth day stem), assess strength, and identify the favorable element. Example: a baby with Jia Wood Day Master born in Shen (autumn, Metal month), weak, favoring Water and Wood.
For Water favor, pick characters with water radicals: Hao (vast), Han (creek), Ze (grace), Lin (rain). For Wood favor, pick wood or grass radicals: Lin (forest), Yi (art), Zhi (mushroom), Xuan (mysterious). It's not "add what's missing" — add what's needed.
Right element plus good sound, easy writing, and positive meaning. Avoid homophones that read badly, rare characters that are hard to type, and overly complex strokes.