After World War II, the network of CMB's routes expanded with exploding population on the island. New buses were purchased to increase ridership. In the mid-1970s, a livery of buff upper body and a blue lower body was adopted. CMB adopt the policy to improve its service during the 1970s, including introducing the first type of rear-engine bus (Daimler Fleetline) and reforming the route number system. In 1976 CMB earned over $20 million HK dollars, the highest in the company history.