Complex sentence: In 1225, Chau Ju-Kua wrote the book "Chu-Fan-Chi" and mentioned that amongst the states controlled by San-Fo-Chi was one called "Peng-Keng", supposedly modern day Pahang.
Split into simpler sentences: In 1225, Chau Ju-Kua wrote the book "Chu-Fan-Chi". He wrote that amongst the states invaded by San-Fo-Chi was one called "Peng-Keng", supposedly modern day Pahang.