The bus - following trials by London Transport of the XA class. Park Royal bodied Atlanteans and XF class Fleetline these vehicles were deemed not suitable for the stop start London traffic conditions and before long both of these classes of vehicles were sold off. The first to be sold were the Atlanteans, being still quite new they were in great demand and China Motor Bus were fortunate in managing to purchase the majority of the 50 vehicles produced. In Hong Kong they were painted in the China Motor Bus red and cream livery where they presented a modern image to the fleet. The buses were modified to allow more ventilation in the hot humid climate of Hong Kong with the addition of horizontal sliding windows, apart from this the vehicles appeared unchanged. The fleet remained in the red and cream livery until the opening of the cross harbour tunnel, which joined Hong Kong island with the mainland of Kowloon. Bus services running through the tunnel brought a conflict of livery styles on joint operated routes and China Motor Bus decided to change its livery colours and the fleet was repainted in the blue and cream colours.