Why didn't the classical harmony of western tradition form in ancient China?

Chinese classical music has beautiful melody and ups and downs. Its melody itself contains rich harmony. For example, in "Mountain Flowing Water", when the melody develops forward, the intervals of four degrees, five degrees, eight degrees or even larger spans are patchwork and complement each other. Western classical music attaches great importance to formal harmony, which is reflected in some multi-voice works. For example, Beethoven's Ninth Symphony (chorus part), no matter the voice or symphony orchestra, has rich music and harmony and magnificent melody. It can be said that a beautiful melody inevitably contains a beautiful harmony, and a beautiful harmony creates a beautiful melody, which is harmonious and unified.