tze-chiang limited express, also spelled "tzu-chiang" or "ziqiang" () is a type of express train service operated by the taiwan railways administration (tra) in taiwan. of the 5 service classes operated by the tra, the tze-chiang trains is the fastest category. ticketing is done on the basis of mileage (nt$2.27 per km with a 10 km minimum fee). this service is operated with 7 different trainsets: the e1000 series push–pull train, the emu1200 (electric multiple unit), emu300 (also an emu), temu1000 ("taroko express"), dr2800 (diesel multiple unit), dr3100 (also a dmu), and the temu2000 ("puyuma express"). the now-retired emu100 was the first trainset built for this service, which was used for 30 years, terminating ordinary runs at june 15, 2009.