The word for Silicon Valley in Chinese On Pleco, there are two entries for the word Silicon Valley, 硅谷 and 矽谷.

One is 硅谷, the other is 矽谷. 

What is the difference between the two?
「硅」(Pinyin guī) is the Mainland Chinese word for silicon, while「矽」(Pinyin xī) is the Taiwan and Hong Kong word for silicon. This difference in the word for silicon transfers over to their respective names for Silicon Valley as well.



From Japanese Wikipedia; top character is PRC chemical element name, bottom character is Taiwan chemical name.




ランタノイド: Lanthanide series
アクチノイド: Actinide series


(Don't know why English and Chinese Wikipedia doesn't provide this naming difference periodic table between PRC and Taiwan)