1954： Established Tong Xing Processing Factory.
1969： Renamed to Tong Lung Metal Industry Co., Ltd.; capital increased to NT$ 6 millions.
1978： The first company to acquire the CNS mark for Cylindrical Door Locks issued by the Central Standard Bureau in July.
1982： Developed Tubular Lock successfully, and was the first company to acquire CNS mark.
1994： Listed on Taiwan Stock Exchange on 10th November.
1995： Obtained ISO-9002 certification in August.