ProZ.com - https://www.proz.com/translation-articles
Pinyin or characters?
https://www.proz.com/translation-articles/articles/2254/1/Pinyin-or-characters%3F
Author: Krzysztof Achinger (X)
Poland
Chinese to Polish translator
http://proz.com/pro/966833 
By Krzysztof Achinger (X)
Published on 03/2/2009