Complex sentence: In Taiwan, the expressway is proposed to connect with a hypothetical G99 Taiwan Ring Expressway in New Taipei City, which would supposedly encircle the island of Taiwan, as proposed by the People's Republic of China.
Split into simpler sentences: In Taiwan, the expressway is proposed to connect with the G99 Taiwan Ring Expressway in New Taipei City. The G99 Taiwan Ring Expressway is a hypothetical ring expressway encircling the island of Taiwan proposed by the People's Republic of China.