A staff member introduces the new Huawei Mate 60 smartphone to customers at the Huawei flagship store in Shenzhen, Guangdong province, China August 30, 2023. REUTERS/David Kirton/File Photo Acquire Licensing Rights SHENZHEN, China, Sept 1 (Reuters) - The surprise launch of the latest high-end smartphone from Chinese tech giant Huawei Technologies (HWT.UL) has triggered an international guessing game over what is inside it. The company, which has been heavily targeted by U.S. government restrictions, began selling its latest Mate 60 Pro for 6,999 yuan ($964) online on Tuesday, raising eyebrows over its decision not to do any prior advertising and...