China Daily, March 6 (reporter Zhao Lei) - on March 6 local time, the four-day Saudi world defense exhibition opened in the capital Riyadh. China’s State Administration of Defense Science, technology and industry organized 8 companies to make a wonderful appearance with the “China military industry” exhibition group. Chinese companies participating in this Saudi world defense exhibition include aerospace long march international trade Co., Ltd., China Precision Machinery Import and Export Co....