- 1. Established Changtai Hardware Co., Ltd. in 1949 with a capital of RMB 50,000.
- 2. The factory was established in the second section of Zhongshan North Road in 1949 and changed its name to Changtai Screw Industry Co., Ltd.
- 3. Moved to Shilin District, Shezi Factory in 1989.
- 4. Moved to the current location of Xinzhuang on August 1, Republic of China.
- 5. The introduction of steel structure high-tension bolts and large-scale foundation bolts were sold in 1965.
- 6. In November 1966, the Commodity Inspection Bureau of the Ministry of Economic Affairs was rated as a second-class quality control factory.
- 7. In March 1967, the Ministry of Economic Affairs and the Central Bureau of Standards awarded it as a orthographic sign factory.
- 8. From September 1968 to December 1986, Taipower Company was qualified as a qualified factory for power transmission and distribution equipment.
- 9. In May 1972, the Commodity Inspection Bureau of the Ministry of Economic Affairs was rated as the first-class quality control factory.
- 10. In 1973, the company introduced the sales of cast steel supports for bridges.
- 11. In October 1974, it was renamed Changtaixing Co., Ltd.
- 12. In 1975, the road and bridge soundproofing project was introduced.
- 13. The construction of the new factory was completed in June 1975 and officially opened.
- 14. In August 1975, Taiwan Power Company, Rong Engineering Department, and Zhonghua Engineering Company were approved as qualified iron structure factories.
- 15. The sales and construction of noise control equipment introduced in 1987.
- 16. In 1978, POT BEARING disc bearings for bridges were introduced for sale.
- 17. In 1979, it introduced the sale of shield machines.
- 18. In the 1980s, the project of introducing waterproof materials for bridges.
- 19. In 1981, the elastic joint filler material for bridges was introduced, sold and constructed.
- 20. In 1981, the expansion joint project for bridges was introduced.
- 21. In 1984, it was inspected and inspected by the State Administration of Industry and the equipment was in compliance with the disc support manufacturing plant.
- 22. In 1985, the steel ring sheet manufacturing technology was introduced to start production.
- 23. Passed ISO 9002 certification in March 1986.
- 24. Passed ISO 9002 certification in March 1986.
- 25. At present, bridge engineering has not been implemented