TAIPEI, Taiwan — At first glance, the bespectacled YouTuber railing against Taiwan’s president, Tsai Ing-wen, just seems like a concerned citizen making an appeal to his fellow Taiwanese.
台湾台北——乍看上去，这个戴着眼镜的Youtube视频发布者对台湾总统蔡英文的斥责，似乎只是一个忧心忡忡的台湾公民向他的同胞发出呼吁。

He speaks Taiwanese-accented Mandarin, with the occasional phrase in Taiwanese dialect. His captions are written with the traditional Chinese characters used in Taiwan, not the simplified ones used in China. With outrage in his voice, he accuses Ms. Tsai of selling out “our beloved land of Taiwan” to Japan and the United States.
他说的是带有台湾口音的国语，偶尔还会说一些台湾方言。他的字幕是台湾人使用的繁体字，而不是中国的简体字。他愤怒地指责蔡英文向日本和美国出卖“我们台湾这片可爱的土地”。

The man, Zhang Xida, does not say in his videos whom he works for. But other websites and videos make it clear: He is a host for China National Radio, the Beijing-run broadcaster.
这个名叫张希达的男子在视频中没有透露自己为谁工作。但其他网址和视频清楚地表明，他是中央人民广播电台的主持人。