My comment:
(i) 章锦华 may be telling the truth when he says 几个月前就向黄之瀚发出了来台湾演讲的邀请. The problem is that according to unwritten rules set up by various American administrations since 1979 is that Wong would not have been able to come. I can imagine that the Trump administration, including then Secretary of State Rex Tillerson, was holding on the invitation in anticipation of the pass of Taiwan Travel Act, which might supply a cover.
(ii) This VOA report continues, "作为美台之间关系密切和牢固的象征之一，耗资2亿1600万美元，占地6.5公顷的美国在台协会（AIT）新馆将在今年6月落成。据信，这个位于台北市内湖的全亚洲造价最高的美国驻外机构，采取堡垒式布局，具有反恐设计。"
I do not know about the first clause (象征). But I can not figure out the trouble: Why prepare for terrorist attack in Taiwan? Will all future US missions be designed against attacks?