Complex sentence: The Tamsui Section section runs mostly along the former Taiwan Railway Administration's Tamsui Sectionhere most of the tracks and stations have been renovated, except in the Zhongzheng district, where a new tunnel was constructed due to lack of surface right-of-way.
Split into simpler sentences: The Tamsui Section section runs mostly along the former Taiwan Railway Administration's Tamsui Section. There most of the tracks and stations have been renovated, except in the Zhongzheng district, where a new tunnel was constructed due to lack of surface right-of-way.