手机端（底部）

YIHO kept close relation with hundreds of industrial and commercial enterprises, engineering and research institutions, construction companies and research universities in china, as a jointment of technology, manufacturing and trade business

Liming Research Institute of Chemical Industry

China United Engineering Corporation

China Hualu Engineering Corporation.

China North Industries Corporation

Tianyi Science & Technology Co.,Ltd

Xi'an Jiaotong University

Zhejiang University

Hangzhou Hangyang Co.,Ltd

Sichuan Air Separation Plant(Group) Co.,Ltd

Yinde Leasing Co.,Ltd.

Shangdong Fin Cnc Machine Co.,Ltd

Zhejiang Supcon Technology Co.,Ltd