"There are around 3 million drones worldwide, 75 percent of which were made in China," Wu said in an earlier interview with China Daily.
The site, located in Fuxin Township, was a fort city along the Great Wall constructed in Han Dynasty (202 BC- 220 AD). Excavation of the site was launched in October 2014, said Chu Jingang from the provincial cultural relics institute.
As of the end of 2017, China had 199 qualified training centers for civilian drone pilots and issued 24,407 certificates, according to a report issued by the Aircraft Owners and Pilots Association of China, a nonprofit organization.
"It shows that drones can be used in diverse businesses, which brings great convenience and incomparable advantages over manned aircraft," said Wang Xiazheng, director of the association's department that deals with unmanned aircraft.
克格勃布设了“无处不在的居民监视系统 ，在各个领域组成了一支人数难以计算、拿报酬的秘密工作者大军”。安德罗波夫任克格勃主席的15年间极大地扩张了克格勃势力。至80年代末 ，克格勃分布在全世界的工作人员约9万 ，另有职员、警卫人员、边防部队和特种部队约40万人。所有高级官员都认为 ，他们的办公室和电话已被窃听 ，因此都非常谨慎。领导人之间基本上没有个人交往 ，彼此没什么好感 ，互不信任。公开化的舆论中 ，克格勃越来越成为被攻击的对象和目标 ，成为“斯大林主义恐怖和罪行”的主要责任者 ，反克格勃浪潮迭起。
The Defense Ministry, responding to a journalist's question in an online statement about the issue, demanded that the US "halt all forms of military links between the United States and Taiwan, as well as all forms of weapon sales to Taiwan".
Last month, US President Donald Trump signed a bill that encourages visits between the United States and Taiwan at all levels, which China strongly opposed.