Shanghai Qianjing Ducting Co., Ltd.
Hebei Lianku Technology Co., Ltd.
Guangdong Geli Air-Duct Manufacturing Co., Ltd.
Zhongshan Flourish Hose Industry Co., Ltd.
Guangzhou Rong Xin Ventilation Equipment Co., Ltd.
Shenzhen Tiger Brand Pipe Industry Co., Ltd.
Utigo Technology Ltd.
