History
- 2020
The company has obtained class I professional contracting certificate for electromechanical equipment installation engineering, class II professional contracting certificate for building decoration engineering and class II professional contracting certificate for building intelligent engineering issued by Shenzhen housing and Construction Bureau
- 2018
Establish "Zonkin Environment" company
- 2017
The company has obtained the grade II professional contracting certificate for electromechanical equipment installation engineering, grade II professional contracting certificate for building decoration engineering and grade II professional contracting certificate for building intelligent engineering issued by Shenzhen housing and Construction Bureau
- 2013
The company has obtained the grade III professional contracting certificate for electromechanical equipment installation engineering, grade III professional contracting certificate for building decoration engineering and grade III professional contracting certificate for building intelligent engineering issued by Shenzhen housing and Construction Bureau
- 2004
Create "Gantong" company
