1957 – Tong Hua Bua Yai Electric Milling Partnership Limited was established with the capacity of 40 tons per day.
1975 – The expansion of the milling facility (2nd plant) was made with the capacity of 160 tons per day.
1994 – Tong Hua Bua Yai 1994 Company Limited was established with the capacity of 300 tons per day with the most advanced technology at the time.
1996 – Tong Hua Rice Company Limited was established for rice export.
2002 – The capacity was increased from 300 to 600 tons per day.
2004 – Bua Yai Bio Power Company Limited was established for electricity generation with the capacity of 7.5 MW.
2009 – The capacity was increased from 600 to 900 tons per day.