Simplify the following text for a Grade 8 native English-speaking person.
Original: Hong Kong International Airport is the main airport in Hong Kong . It is colloquially known as Chek Lap Kok Airport ( è é è ' æ å ) , because it was built on the island of Chek Lap Kok by land reclamation , and also to distinguish it from its predecessor , the closed Kai Tak Airport .
Simplified: Hong Kong International Airport , also known as Chek Lap Kok Airport is the airport of Hong Kong that was built at Chek Lap Kok on Lantau Island .