An observant reader sent in this relatively rare example in Taiwan of the use of Hanyu Pinyin with tone marks on signage
The sign, here in aesthetic Banqiao, of course, reads:
Esthetic Nail Salon
(Dǐ jiā xīnlíng měixué guǎn)
The Pinyin is not just “esthetic,” because most people probably don’t know the character ‘㭽’. Although they could probably take an educated guess that 㭽 is pronounced dǐ because of the 氐, that’s not the same thing as knowing for sure. So the Pinyin comes in handy even for most literate Taiwanese — if they can see it.
What’s especially surprising is that the people at the store went with Pinyin instead of zhuyin fuhao: ㄉㄧ ㄐㄧㄚ.