The Japanese onomatopoeia for a high-pitched metallic ringing or "ching" sound—similar to coins, bells, or a "cha-ching" effect—is generally represented as kin kin (きんきん) for high-pitched clanging or simply chin (ちん) for a sharp, single bell/coin sound. These mimic metal objects hitting each other. If you've been looking for that "Cha Ching" sound effect for your work, here it is! I hope you enjoy using it!