He visited foreign aluminium plants,research institutes and universities hence got acquainted with some internationally famous scholars,especially Professor Kai Grjotheim (Norwory).

• 他访问过挪威、新西兰、美国、日本和俄罗斯诸国的炼铝厂、研究所和大学，结识了多位国际上著名学者，特别是挪威的凯.；格罗泰姆教授