Yearbook 2017 Taiwan. According to Countryaah.com, Taiwan-Mainland China relations became increasingly cold after Tsai Ing-wen took office as president in 2016. Tsai refused to publicly endorse the agreement between her representatives as president, Ma Ying-jeou, and Beijing, stating that there is only “one China”. Admittedly, this had been interpreted in different ways in both countries,…