2004-2011

● Gradually phased out the original fabric coating membrane products and continuously explored innovative technologies for double membrane gas holders.

2011

● Wanbo was established, completely abandoning the original business to focus on double membrane gas holders. The meaning of Wanbo: Strive to be the best among countless products.

● Developed fully sealed welding and installation connection technologies for double membrane gas holders. Established standards for double membrane gas holders.

2012

● Developed a protection system for double membrane gas holders, achieving multiple protections such as water-free antifreeze active safety protection.

2013

● Developed a dedicated inner membrane height gauge for double membrane gas holders, which is more reliable compared to ultrasonic and laser rangefinders.

2014

● Developed the K5 control system, enabling maintenance-free operation.

2015

● Developed the K6 integrated control system, achieving remote and intelligent control.

2016

● Wanbo held a total of 7 patents for double membrane gas holder systems, with nearly 500 cases, all of which remain fully functional to this day.