Complex sentence: Conservationists now see this as just a battle in order to safeguard the heritage of Hong Kong, and have vowed to take the fight to Queen's Pier, and a number of other historical sites which may meet with a similar fate.
Split into simpler sentences: Conservationists now see this as a battle in order to safeguard the heritage of Hong Kong. They have vowed to take the fight to Queen's Pier, and a number of other historical sites which may be met with a similar fate.