| 1972 | Sumei founded in Taipei, Taiwan |
| 1976 | Hones established in Taoyuan, Taiwan |
| 1980 | Honmei established in Taoyuan, Taiwan |
| 1986 | Sumei, Hones, and Honmei consolidated and renamed to Sumei Chemical Company Limited |
| 1991 | Established Syntak Company Limited in Hong Kong |
| 1993 | Hontex (Dongguan) completes factory construction and begins production |
| 2003 | Rayan (Dongguan) completes factory construction and begins production |
| 2006 | Sumei (Kunshan) Company completes factory construction and begins production |
| 2008 | Hones (Dongguan) Company completes factory construction and begins production |
| 2010 | Sumei Chemical established US office and Canada office |
