Various conservation projects have been carried out to preserve archaeological remains affected by construction work on the Airport Core Programme (ACP).
In a survey of Ma Wan, through which the Lantau Fixed Crossing passes, a late Neolithic (2,500 - 1,500 BC) site was discovered at Sha Lau Tong Wan.
Western Han (206BC - AD25) materials with iron implements and Six Dynasties (AD220 - 589) burial objects were excavated at Pak Mong, Lantau, where the North Lantau Expressway is being built.
At Chek Lap Kok, several significant sites were identified and artifacts discovered. These include a rich Bronze Age deposit with five groups of buried offerings discovered at Kwo Lo Wan, Tang Dynasty (AD618 - 907) lime kilns, pottery and coins at Sham Wan Tsuen, and Middle Neolithic (4,000 - 2,500 BC) pottery at Fu Tei Wan.
With the help of the Airport Authority, a Yuan Dynasty (AD 1,271 - 1,368) kiln complex discovered at Ha Law Wan has been preserved as part of the conservation area at Chek Lap Kok.
The surveys conducted over the last five years have all yielded useful information which enable archaeologists to re-interpret the achievements of the early inhabitants of the region.