Web site lists daily lost items, at which station and which train by number. I found my lost item, which was 150km away but will be sent back to Kaoshuing. Even NT$100 lost is listed as found on the train. Very nice people at Chouzhou/ Pingtung station helped me with this.
[交通部臺灣鐵路管理局 (railway.gov.tw)
For a moment I thought you meant “great service” was listed as a lost item! 
Very cool! Makes me feel like intentionally losing something to see how they describe it on the list, what qualifies as worthy of listing, and what I need to do to prove that a regular black bag containing a half-eaten pomegranate and a copy of GQ is, indeed, mine.