Complex sentence: The Java Chinese participation in retaking Malacca was recorded in "The Malay Annals of Semarang and Cerbon" trading the Chinese did business with Malays and Javanese instead of the Portuguese.
Split into simpler sentences: The Java Chinese participation in retaking Malacca was recorded in "The Malay Annals of Semarang and Cerbon". The Chinese traders did business with the Malays and Javanese instead of the Portuguese.