| Y.T.O. INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Y-TONE CO., LIMITED | Private company limited by shares | Live |
| Y-TONE (WORLDWIDE) LIMITED | Private company limited by shares | Live |
| HK YTONG LIMITED | Private company limited by shares | Live |
| SHENZHEN YTONG ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| YTONG TRADE CO., LIMITED | Private company limited by shares | Live |
| HK YTONG TRADE CO., LIMITED | Private company limited by shares | Live |
| YTONG HONG KONG LIMITED | Private company limited by shares | Live |
| YTONG TRADING LIMITED | Private company limited by shares | Live |
| Y-TOP LIMITED | Private company limited by shares | Live |