In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: The Chinese Academy of Sciences ( CAS , formerly : Academia Sinica ) is the supreme institution for all the natural science organisations in China .
A: 
The Chinese Academy of Sciences ( CAS ; ) , with historical origins in the Academia Sinica during the Republican era and formerly also known by that name , is the national academy for the natural sciences of the People 's Republic of China ( PRC ) .