In 2016, Beijing cut off high-level communications with Taiwan after the ruling Democratic Progressive Party’s (DPP) Tsai Ing-wen became president, citing her refusal to endorse the concept of a single Chinese nation. The DPP is among those who have criticised Cheng’s trip, accusing her of being “subservient” to Beijing.
Source: https://www.bbc.com/news/articles/cj94y87k2ljo?at_medium=RSS&at_campaign=rss