Tongyong Pinyin
In 2002, the ROC adopted Tongyong Pinyin as its national standard for romanization. Most townships and county-administered cities changed their romanization to Tongyong Pinyin at that time. However, some local administrations, like Taipei and Taichung, decided to use Hanyu Pinyin. In 2009, Tongyong Pinyin was replaced by Hanyu Pinyin as the ROC government standard. Currently, most of the divisions are romanized by Hanyu Pinyin system, but some local governments still use Tongyong Pinyin, like Kaohsiung. In 2011, the ROC Ministry of the Interior restored historical romanizations for two towns, Lukang and Tamsui.